Locking objects

Can I lock objects in Toon Boom? Sometimes I have many lines in a drawing and want to edit a specific one,but the program keeps selecting whatever is in front by default. This is VERY annoying and makes the workflow waaay slow.
Please tell me that there is a “lock” and “unlock” function, just like in Illustrator!
(and I’m not talking locking layers, I’m talking like, locking individual objects/brushstrokes/paths inside a layer)