Just wondering if there was a way to expand the default 3Ds Max Viewport grid ? By the number of rows/columns. Similar to how the grid looks when in top/left/right viewports.
Right click on the "Percent Snap toggle" (little magnet with the % sign). In the tab "Home grid" up the amount in "Perspective view grid extent". All the other options that relate to the grid can also be changed in that window.