Sorry, I have been looking thru all your info, but can't find how to stop showing the right-side box on all crafting. I'd like default to not see it. Also, when mousing over items like leather to see if one of my other alts has it, or how many in the bank, the box is so long (showing what all that item can be used for) that I can't see the bottom info on who has it or how many.
I've tried unchecking things. Could not find Tooltip Items in the interface options, which I saw in your description screenshots. I don't want to uncheck the options into instability or uselessness.
Thanks much for a very useful addon! Linda

Sorry, I have been looking thru all your info, but can't find how to stop showing the right-side box on all crafting. I'd like default to not see it.

You can disable the option "Automatically show Profession List" though keep in mind this may make ATT unable to collect existing Recipes properly on new characters.

Also, when mousing over items like leather to see if one of my other alts has it, or how many in the bank, the box is so long (showing what all that item can be used for) that I can't see the bottom info on who has it or how many. I've tried unchecking things.

Two options for this: Reduce the slider of "Summarize Things". This is basically how many rows of information are allowed to be put into tooltips of what the Item can be used to collect.
Other option is to disable Summarize Things or tooltip attachments completely, or to use a modifier key to only include ATT information when desired.

Could not find Tooltip Items in the interface options, which I saw in your description screenshots.

There is a separate settings tab which contains settings concerning Tooltips specifically.

I don't want to uncheck the options into instability or uselessness.

Hopefully there's no way to break the addon by disabling options! Though I would definitely consider removing a lot of the information as leading to uselessness though haha

If this doesn't help I'll try to post screenshots.

Thank you very much for the complete and comprehensive answer to my questions. It works!