I am working on a drawing and all of a sudded it will zoom out but not in.
Sometimes saving, closing, and reopening helps with hinky crap.
Sometimes placing the offending elements on the workplane helps.
Sometimes your program is corrupt and you gotta reinstal if that happens go find these two files after you get a good instal:
In Win 7 the path to the directory will be:
App data / roaming / IMSIdesign / turbocad / 16 / professional / profiles / built in
But you can just do a search and find them.
The files areTCW16_xml.ini
If you have a different version of TC you may have slightly different names or maybe even different files altogether. I'm sure some one here can tell you what they are in Ver. 11 or TC tech may be able to inform you.
Copy good versions of those to a folder you'll remember Mine is right there in the folder Built in and called Backup
When you system goes goofy just copy and paste the good versions to the Built in folder overwriting the ones already there.