Good day.? When I click on "New Pascal Unit" on the toolbar, or select it from the menu, the new unit is automatically added to the uses clause of my main program.? Worse, the new unit is invariably added as "unit1", even after I change the name of the unit.? I cannot seem to find a way to suppress this behaviour. Can anyone tell me how to stop Lazarus from doing this?

I am not aware how to entirely to disable this.

About renaming.
If you do "Save Unit as" and enter a new name, then it should rename the unit in other units "uses" clauses.

IMHO, I consider it a bug that it does not update other units, if you change the name in source code before you save the unit for the very first time.

Obviously, once you saved the unit, you must do "save as" to rename it. Otherwise the name in the source, and the filename will not match.

PM Timothy Groves wrote

Can anyone tell me how to stop Lazarus from doing this?

Yes, it's annoying.

Project->Options->Miscalleneous: uncheck "Main unit has uses section containing all units of a project."

I think this is a per project setting and not globall.

Yep, that did the trick.? Thanks!