Viewport navigation in Houdini

Viewport navigation

pivot tumbling

mouse over any point and hit space+Z (now it rotates around that point!)

gimball/pivot axes

press ENTER to see it

move points only on XY axis

(for example in side view) find the tiny dot next to gimball, it only enables 2 axes when moving!

align handle to world/object/component

select polys to move -> rightclick on handle -> component