It's a not a huge deal, but I'm pretty used to doubleclicking that little doodad to close my images, so I figured I'd try to get it back.
Here it is in X2 (on the left) and the little "@" symbol is the version I've recreated to work around its absence in X4 (on the right):
To do this, open any image, start recording a macro, close the image, Save the macro and call it "Close Current Image" or something like that.
Restart X4 because customization changes don't stick if you've had an image open this session. (long standing bug)
Right click the empty space in the middle of the Edit perspective. Choose Customize. Hit the Scripts tab. Find your macro in the dropdown, pick an icon and hit the Bind button. Your script now appears in the Bound Scripts part of the dialog.
Switch to the Commands tab. Select Bound Scripts. Drag your script to the left end of the Menu bar. Even though you've bound an image to it, the image doesn't show (another bug, I guess). Right click your new rather wordy looking "Close Current Image" menu entry and select "Button Appearance". At the bottom of the Button Appearance dialog you can change the text to something nice and short like "@" or "X" maybe. Hit OK, and you've got a convenient close image button that lives visually in about the same spot as similar icons in most MDI-based software.
Restart X4 after customizing and before starting any work otherwise the changes won't stick.
