How to take screenshot of a scrollable dialog box in a webpage?
How to capture the whole contents of a scrollable dialog box in a webpage.
Todas as respostas (2)
Not a screenshot as you asked about, but ...
If there is separate "enter" button for an action after selecting an item in the scrollbox, try a click to highlight one item and then do {Ctrl + A} to select everything. Then copy the highlighted group. Then paste into a text program.
Are you using the built-in screenshot command that is part of the Web Developer Toolbar (Firefox/Tools > Web Developer)?
That command has an option to take a full screen shot and you can also delay the action if you need to click on the page to open a dialog. I don't think however that you can catch scrollable content in a frame or select/option dialog.