if you were, like me, annoyed at #kicad 10's annoying lasso UI, here's a work-around.

Go to preferences -> toolbars, check 'custom toolbars', Edit your toolbars, edit the right toolbar, delete the entire "Selection Tools" group. Add "Rectangle" back. Optionally, add Lasso back (it is, admittedly, occasionally useful).

They'll both show selected all the time, because UI is hard, but at least you'll stop accidentally selecting the goddamn lasso all the time.