Manual positioning tips

Since the introduction of Base sliding and Assisted bomb drops, I can't think of cases where you want to manually handle stuff. Here's how to do it anyway.

Using the Hand tool:
Simply pick stuff up, rotate with Q/E or scroll, hold right click to lower and position it is any way you want.
It is kind of imprecise, but it is fast.

Using the Gizmo tool:
First, roughly position the thing using Hand tool. Then click F9 to switch to Gizmo and click anything you want to move. Dragging arrows translates, while dragging around circles (appear once you switch to gizmo rotation mode on left side, tools buttons) rotates things. This will allow you to fine tune positions of anything very precisely. Switching to 'Local' coordinates may help too.