Is there a way to make grid lines and object lines thicker

Sometimes I find it super hard to see collider lines or when I am moving objects through one another the mesh lines practically become invisible and I have no clue if things are lined up properly. Is there a way to make the grid lines and collider lines and all lines in general more visible or thicker?

Also, is there a snap to floor button like they have in Unreal?

 

The line width can't be changed. For snapping, hold shift+command (Mac), or shift-control (Windows), and drag the center of the transform widget of an object (yellow square), then the object will snap to another object you drag it to. Needs a collider to work. Also, hover over a vertex of an object and hold V, then click and drag, and that particular vertex will be snapped to another object that you drag to. (That is, the entire object will be snapped, but it will be aligned using the selected vertex.)

--Eric

 

I tried the shift-control snapping and my object doesn't snap to other colliders, I tried snapping a cube it to the "floor" that I made and it snapped like it was grid snapping and snapped completely below the "floor" object to a blank space below it?

 

No, it snaps to the surface. The surface you're snapping to requires a collider. Hold down shift-control, then click on the center of the transform widget (yellow square) and drag.

--Eric