I suppose you tried to resize the window by right click in top (blue?) area

As I mentioned in the latter part of my question, when the window first appears, the bottom displays ok, just above the task bar. However, on this initial display, the top part of the window (the blue bar), is then hidden above the top of the screen, not allowing me to customize the window.

The only way I am able to show the top of the window, is to click on the double arrow at the very bottom of the window, then instead of being able to click and drag the bottom of the window up using the double arrow, clicking on it, instead drops the entire window down, hiding the OK button behind the task bar.

At this point, I can either hide the task bar, and then being able to click on the OK, or resize the top of the window down, and then moving the window back up to display the OK button.

The window does not display both the top and bottom of the window at the same time, it is either off the screen at the top (hiding the blue bar), or behind the task bar at the bottom (hiding the OK button).

To make a single change, and clicking OK to save it, instead of 2 steps, requires 5, only because the initial window is not sized to fit between the top of my monitor and the top of my task bar at the bottom (like 99.9% of other windows).

re :The window does not display both the top and bottom of the window at the same time, it is either off the screen at the top (hiding the blue bar), or behind the task bar at the bottom (hiding the OK button).

you say you did resize: resize the top of the window down, and then moving the window back up to display the OK button.

I presume the issue is that this new size is not being remembered the next time you open that window.

Please try this: Make hidden files and folders visible:

• http://kb.mozillazine.org/Show_hidden_files_and_folders

In Thunderbird

• Help > Troubleshooting information
• click on 'show folder' button

a new window opens showing the contents of your Profile folder name.

• Close Thunderbird now - this is important,.

scroll down, look for and delete these files:

• session.json
• xulstore.json

• Close window - top right X
• Start Thunderbird.

Open the Account Settings window (right click on mail account in Folder Pane and select 'Settings').

If required, resize window to acceptable size.

Close and restart Thunderbird. Open the Accounts window and report back as to whether it has opened correctly this time.

No dice. The Account window opens just the same. Checked the 2 files I deleted and found that they were recreated, apparently when I restarted Thunderbird, so obviously the window would open the same.

If these are the 2 files that effect this window, not remembering the prior size, is there any way to delete them permanently?

Do your have the windows display mode set to 125% in display in control panel?, Do you have the Theme and font size changer add-on installed?

Both of those could make the windows look as you say I think.

Note here that pressing the enter key will perform the Ok action on that dialog. So I am treating this more an an annoyance than a problem. Having said that at6 some point filing a bug may be appropriate. Once we determine the cause

dave0judy: Those files should be created as new, but I had hoped they would remember the new window size after resetting the window and then restarting TB. Obviously this did not work.

What OS are you using? What is the height of your desktop/monitor ?

I decided to test this issue. I've just been testing on my system - Windows Vista OS Using versions 38.6.0 and 38.7.0 Using default theme. The Account Settings window always opens ok size for me, so I've never needed to make it larger; hence was not aware of the issue. I made it a bit wider/taller and closed window. Testing both using 'Size' and drag window edges option. I noticed that it did not remember the increased size when I reopened the window. It did remember the position on the desktop when I moved the window.

Thunderbird Safe Mode test: Same results.

Matt: Could you do this simple test as it is now looking like a bug?

Matt,

Ok, First, I removed the Theme and Font Changer Addon, which was installed on FireFox but not Thunderbird.

Went in again to Thunderbird/Account Settings, resizing it a number of times and restarting Thunderbird, it always displays, cutting off the top 2 accounts, with the scroll bar scrolled to the bottom. Note that I have 4 accounts installed including the local folder settings at the bottom, so with it scrolled to the bottom, the top 2 accounts are scrolled off of the screen at the top.

I tried making a change and using Enter to click the OK button, but nothing happened, so this doesn't work either.

Per your previous message, my screen size is 21" x 11.5" and the resolution 1360 x 768, both approximately at 16:9. My screen setting is 100%, not 125%. I am using Windows 8.1.

Please add the troubleshooting information to your post To find the Troubleshooting information:

• Open Help (or click on three-line-icon and select Help)
• Choose Troubleshooting Information
• Use the button Copy to clipboard to select all. Do not check box "Include account names"!
• Paste this in your post.

Application Basics

   Name: Thunderbird
   Version: 38.7.0
   User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.0
   Profile Folder: Show Folder

             (Local drive)
   Application Build ID: 20160310150025
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory

 Mail and News Accounts
   account1:
     INCOMING: account1, , (pop3) pop.embarqmail.com:110, alwaysSTARTTLS, passwordCleartext
     OUTGOING: smtp.embarqmail.com:587, alwaysSTARTTLS, passwordCleartext, true

   account2:
     INCOMING: account2, , (none) Local Folders, plain, passwordCleartext

   account3:
     INCOMING: account3, , (pop3) pop.embarqmail.com:110, alwaysSTARTTLS, passwordCleartext
     OUTGOING: smtp.embarqmail.com:587, alwaysSTARTTLS, passwordCleartext, true

   account6:
     INCOMING: account6, , (pop3) pop.gmail.com:995, SSL, passwordCleartext
     OUTGOING: smtp.gmail.com:465, SSL, passwordCleartext, true

   account8:
     INCOMING: account8, , (pop3) pop.gmail.com:995, SSL, passwordCleartext
     OUTGOING: smtp.gmail.com:465, SSL, OAuth2, true

 Crash Reports

 Extensions
   AttachmentExtractor, 1.3.5.1, true, {35834d20-efdb-4f78-ab77-9635fb4e56c4}
   Lightning, 4.0.7, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}

 Important Modified Preferences

   Name: Value

     browser.cache.disk.capacity: 358400
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     extensions.lastAppVersion: 38.7.0
     font.minimum-size.x-western: 12
     font.name.monospace.el: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.serif.el: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 16
     font.size.variable.el: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 18
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: ab55d0d0-e563-4794-a592-db220091bb7
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1458077732
     places.history.expiration.transient_current_max_pages: 104858
     plugin.importedState: true
     print.printer_HP_Officejet_J6400_series.print_bgcolor: false
     print.printer_HP_Officejet_J6400_series.print_bgimages: false
     print.printer_HP_Officejet_J6400_series.print_colorspace:
     print.printer_HP_Officejet_J6400_series.print_command:
     print.printer_HP_Officejet_J6400_series.print_downloadfonts: false
     print.printer_HP_Officejet_J6400_series.print_duplex: -437918235
     print.printer_HP_Officejet_J6400_series.print_edge_bottom: 0
     print.printer_HP_Officejet_J6400_series.print_edge_left: 0
     print.printer_HP_Officejet_J6400_series.print_edge_right: 0
     print.printer_HP_Officejet_J6400_series.print_edge_top: 0
     print.printer_HP_Officejet_J6400_series.print_evenpages: true
     print.printer_HP_Officejet_J6400_series.print_footercenter:
     print.printer_HP_Officejet_J6400_series.print_footerleft: &PT
     print.printer_HP_Officejet_J6400_series.print_footerright: &D
     print.printer_HP_Officejet_J6400_series.print_headercenter:
     print.printer_HP_Officejet_J6400_series.print_headerleft: &T
     print.printer_HP_Officejet_J6400_series.print_headerright: &U
     print.printer_HP_Officejet_J6400_series.print_in_color: true
     print.printer_HP_Officejet_J6400_series.print_margin_bottom: 0.5
     print.printer_HP_Officejet_J6400_series.print_margin_left: 0.5
     print.printer_HP_Officejet_J6400_series.print_margin_right: 0.5
     print.printer_HP_Officejet_J6400_series.print_margin_top: 0.5
     print.printer_HP_Officejet_J6400_series.print_oddpages: true
     print.printer_HP_Officejet_J6400_series.print_orientation: 0
     print.printer_HP_Officejet_J6400_series.print_page_delay: 50
     print.printer_HP_Officejet_J6400_series.print_paper_data: 1
     print.printer_HP_Officejet_J6400_series.print_paper_height: 11.00
     print.printer_HP_Officejet_J6400_series.print_paper_name:
     print.printer_HP_Officejet_J6400_series.print_paper_size_type: 0
     print.printer_HP_Officejet_J6400_series.print_paper_size_unit: 0
     print.printer_HP_Officejet_J6400_series.print_paper_width: 8.50
     print.printer_HP_Officejet_J6400_series.print_plex_name:
     print.printer_HP_Officejet_J6400_series.print_resolution: -437918235
     print.printer_HP_Officejet_J6400_series.print_resolution_name:
     print.printer_HP_Officejet_J6400_series.print_reversed: false
     print.printer_HP_Officejet_J6400_series.print_scaling: 1.00
     print.printer_HP_Officejet_J6400_series.print_shrink_to_fit: true
     print.printer_HP_Officejet_J6400_series.print_to_file: false
     print.printer_HP_Officejet_J6400_series.print_unwriteable_margin_bottom: 0
     print.printer_HP_Officejet_J6400_series.print_unwriteable_margin_left: 0
     print.printer_HP_Officejet_J6400_series.print_unwriteable_margin_right: 0
     print.printer_HP_Officejet_J6400_series.print_unwriteable_margin_top: 0

 Graphics

     Adapter Description: Intel(R) HD Graphics 4600
     Vendor ID: 0x8086
     Device ID: 0x0412
     Adapter RAM: Unknown
     Adapter Drivers: igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32
     Driver Version: 10.18.14.4029
     Driver Date: 11-18-2014
     Direct2D Enabled: false
     DirectWrite Enabled: false (6.3.9600.18123)
     ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 400
     WebGL Renderer: false
     GPU Accelerated Windows: 0

     AzureCanvasBackend: skia
     AzureSkiaAccelerated: 0
     AzureFallbackCanvasBackend: cairo
     AzureContentBackend: cairo

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.10.10
     4.10.10

     NSS
     3.19.2.3 Basic ECC
     3.19.2.3 Basic ECC

     NSS Util
     3.19.2.3
     3.19.2.3

     NSS SSL
     3.19.2.3 Basic ECC
     3.19.2.3 Basic ECC

     NSS S/MIME
     3.19.2.3 Basic ECC
     3.19.2.3 Basic ECC

I see nothing in the details to cause this, but looking back I do not think you have tried starting Thunderbird in safe mode. That is hold the shift key while you start it and continue in safe mode when prompted.

While we discuss this and fiddle as we really have no answer and are looking for one, you might right click the windows task bar and select properties and then auto hide so you can use the ok button. The task bar will reappear if you drag your mouse to the very bottom of the windows to change it back to normal.