This feature is not available in CircuitStudio. In general, the Altium Designer documentation is useful for CircuitStudio as they share similar features but CircuitStudio also has differences and the find similar object function is one of those differences.
thanks, but i have all my designators hidden (bottom for example) and it's not possible to select them and to set them visible?
Unfortunately, you may need to use the PCB Filter to pick each component, one-by-one and edit the properties to make the designators visible again. This is another case where the lack of the Find Similar option in Circuit Studio is a major productivity problem.
I was able to use the PCB Filter to select all text on the Bottom Overlay and then use the PCB Inspector to change it to be visible. But sadly it makes other, non-designator, text visible too. I could not see how to filter on only the designator text.
According to this doc : Editing Multiple Objects | Online Documentation for Altium Products i'm looking for the "find simular object" but it seems that i have not this menu. I don't understand why...
Thank you for your help