Hello,
I used to work with 3d software, but when I used UE4 for the first time today, I was lost. The camera movment in the viewport is weird for me. I can’t turn around objects for exemple.
There is a feature that I missed?
Thanks, and I’m french so sorry for my bad english 
You can use W,A,S,D to move around like you would a first person shooter, and use the mouse wheel to control your movement speed. You can also use I think ALT to orbit around a point, like when you open a Static Mesh
Oooh ok that’s Alt + LMB. I tried Alt, Ctrl and shift with RMB and middle but not with left ^^
Thank you 