SOIC just halved that, with 50 mil pitch and 25 mil grid. DIP was fine - 50 mil grid, pads on 100 mil centres. What made that technique painful was mixed technology boards. Once you got the hang of it, you could build boards _fast_. + and - (numeric pad) changes layers, page up and page down zooms in and out. You move around with the cursor keys - arrows move one grid position, numeric keypad moves ten. For the longest time I rarely touched the mouse under Windows versions of Protel, as my original DOS machines had no mouse, so _everything_ was done by the keyboard. If you're up for some nostalgia, try running AutoTrax under a DOS emulator, such as DOSBox. AutoTrax was originally the name for Protel's PCB editor.
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