The key command is by default unassigned - so you will need to assign it. It is called "Attach staccato" - Highlight the note(s) you want to apply the staccato symbol to and pressing this key command will insert them automatically. How they are inserted ( above the notehead or above the stem) is a function of how you have the staff style ( stems ) parameter set up and the individual note attribute stem direction parameter.
Logic Pro X Certified : Logic Pro X 10.4.6: OS X 10.14.6
2018 Mac Mini 3.2 GHz Intel Core I7 : 32GB Memory : 2-1TB SSD ; 4 Drobo's 48TB combined
Presonus StudioLive 16 Series III (Digital Audio Interface and Control surface for Logic)
Roland BK-7M ; Roland FR-8X : Novation Impulse 61 & 25 ; Ketron SD-90 ; Iconnectivity Mio 4 (Networked)