From that screen shot, it looks to me like the column width for the Actions and Tree has become very wide. Try making console a window and see if you get a horizontal scroll bar at the bottom. If you do, scroll right and you might find the incident form. If you do, drag the width back.
It's just a hunch!
We had 1 user who continually had this happening to them. From memory I think it was to do with the OS screen display settings (Windows 7 in this users case). We ended up deleting everything for that user in the tps_application_user_setting table which reset all the windows back to the default settings.
I'm assuming this is in your live enviroment so as always make sure you have a backup and test it out on one user first (ideally in your test enviroment if you can replicate it in there).
The above is correct, there is a problem record for the issue:
5364 - Panel widths in Console continuously increase when the PCs DPI setting is changed
There is also a workaround in the following community article, also setting to dpi settings back to default should stop this reoccurring:
Is it possible to raise this with your support provider quoting the above problem reference number above.