For example, using Osnaps you can accurately pick the end point of a line or the center of a circle. Osnaps allow you to snap onto a specific object location when you are picking a point. Come back soon for more great CAD tips.The Object Snaps (Osnaps for short) are drawing aids which are used in conjunction with other commands to help you draw accurately. Both Osnap and Ortho can really slow you down when you don’t need them to be on, so I suggest that you use the function keys to make the AutoCAD settings work for you, rather than against you. My personal favorite function keys are F3 (Osnap) and F8 (Ortho). I remember, long ago, even putting little paper labels on my keyboard, showing the F key functions–I know, that’s really nerdy. It only takes a few minutes to memorize the functions using the diagram above. Using them is definitely faster than using the mouse to click on the settings buttons at the bottom of the work area. The function keys are potentially great time savers.
Even hotkeys require you to hit a letter or two plus the Enter or Spacebar key. There are not many things you can do in AutoCAD with only one keystroke. If you like it but only at times, this key will help. It seems to me that you probably either love Dynamic Input (which puts the Command Line and Status Bar information near your pointer in the work area) or you hate it.
Note that when you use this key to turn Polar Tracking on, Ortho is automatically turned off. Very useful when working with designs having more than one geometric orientation, as when part of the design is rotated 45 degrees in relation to another part.
It’s right next to the heavily-used Escape key, often gets bumped by mistake, and is likely to frustrate the CAD user who is constantly needing to hit Escape to get free of a “sticky” command such as the Line tool. This key can be more trouble than it’s worth. F1 - Opens the AutoCAD Help window, v-e-r-y s-l-o-w-l-y.Diagram of the Function keys and their functions