Hello :)

I have this issue that I'm not sure whether it is something normal or not. So, after modelling rocket nose cone, when in Edit Mode, I have this weird clipping issue. That exists only in Edit Mode; not in Object Mode.

Is that normal or have I done something incorrectly?

something like in Solidworks or fussion360   tree ... so we can edit the previous taken step later

box goes away if you click off the circle

Prior to 2.8 you could use Ctrl-Tab to make a selection method, i.e. Vertex, Edge, Face. This functionality is changed to bring up the Mode Pie menu. Is there no shortcut key for Vert/Edge/Face selection.

Also when selecting a Mesh Edit tool from the Tool shelf is there no method for escaping/ending the operation. Also the function of some tools have changed, such as the Loop Cut when selected from the Tool shelf does not allow you to set the # of cuts with the scroll wheel, is this operation only available in the Tool Properties window

Does it cause an issue when rendering your model if you have mesh objects overlapping like the top of the rocket over the fuselage?