For that last one, did you tried the 'F' key when the mouse pointer is hover a polygon ?
Or maybe you are looking for something different ?
yes I have tried that ... but its not what I mean
its always hard to explain in a language whats not your native language
what I mean is generally work in the vieport like in Maya or C4D and such. For example I zoom in to amodel part I want to work on ... I always have to hit "F" to center the view ... what I mean is to pan, rotoate or zoom where ever my mousr tip is like it is in almost every 3D app.