It is easy to open the Task Pane in Reader X by an inadvertent click on the "Comment" or "Share" button on the toolbar. When that happens, much display space is occupied by the Task Pane. However, I can't find any feature for closing the Task Pane, nor can I find any information about it in Reader X Help or on the web. I'm probably missing something obvious! If anyone knows how to close the Reader X Task Pane (without closing Reader), please post the solution.
"Task Pane" is Adobe's terminology -- e.g., http://help.adobe.com/en_US/acrobat/pro/using/WS8b24479264ec4228503f71 9f12bedff5483-8000.html
Yes, I can hide the Comment tools in that way, but I have not yet found a way to get the Task Pane itself to close (short of closing Reader X entirely).
If there is no simple way to close the Task Pane, then some users will probably start calling it the "Task Pain"!
After some experimenting, it seems that clicking the "Comment" or "Share" toolbar button makes the Task Pane close if none of the panels in the Task Pane is open, but (usually?) does not make the Task Pane close if one or more of those panels is open. On my installation, there is inconsistency -- or else I haven't yet got the procedure figured out! At this time, I have a PDF open in Reader X, and clicking the Comment or Share button does not make the Task Pane close. What I hope to discover is a way to make it close always -- such as a keyboard shortcut.
Bernd, good suggestion. To test that. I'll uninstall and re-install Reader X.
It occurs to me that it might also be an interaction between Acrobat 9 and Reader X, because I have both running at the same time. I need Acrobat for various PDF functions, but I need Reader X for highlighting Find hits (which does not work in Acrobat 9.4.5). If Acrobat could highlight Find hits, then I would use only multiple instances of Acrobat and would not have Reader X running at the same time.