How to put more details on the main grid

I am working on a walkcycle and would like a more detail grid.

I don’t think you can increase the grid detail

but you can either use the transform properties window to get the numeric value of any position

if you can’t get any more detail in the grid when you zoom in (in ortho views)
maybe your object is really tiny
you can just scale your model up - so that if you need to zoom in to look at details the grid will also zoom (in ortho views)

In the view properties floating window you can adjust the grid spacing, lines and divisions. Is that what you are looking for?