Snap to grid not working - Cursor/Pickbox not snapping
Maybe you are zoomed too far out to see that it is working. Draw a line of any length at 0 degrees, then click on it and open properties. Do the endpoints show numbers that are exact multiples of 5? If so then snap is working.
GrantsPirate
Piping and Mech. Designer
Always save a copy of the drawing before trying anything suggested here.
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If something I wrote can be interpreted two ways, and one of the ways makes you sad or angry, I meant the other one.
To turn on your grid and your snap-to-grid make the icon shown below blue.
To determine your Grid Spacing, right-click on either Drawing Grid or Snapmode and select Snap Settings. on Snap and Grid Grid tab you'll see 'snap x' and 'snap y' spacing. The numbers are your drawings units. Drawing units can be inches, feet, mm's, meters, and much, much more (see below).
Chicagolooper
With computers today there is no reason to set limits to drawing space as people did years ago. Just leave it unlimited. It is also wise to try and draw things near 0,0 as drawing them way out in space for no reason just makes autocad do more work and can sometimes cause rounding issues. By way out in space, I'm talking 100's of thousands of feet or millions of feet.
Nick DiPietro
Cad Manager/Monkey
I agree, there doesn't need to be limits. However, there are times when large x and y values are necessary. For example, if you are drawing in a state plane coordinate system, then yes, the numbers are inherently large. Six and seven digits to the left of the decimal. Many Cad objects, such as points (monitoring wells, soil borings, fire hydrants, cell towers, etc.), or polygonal objects (electrical transformers, lakes, parcels, building footprints, etc.) are drawn in state plane then cut and pasted (using 0,0 as copy basepoint and 0,0 as paste point) to other Cad verticals. For many, being far away from the origin doesn't matter. Afterall, is just a number, not a heavily weighted xref or something requiring a sophisticated Cad operation. I like to 'trust' Cad and let it do the heavy work. I like doing the easy stuff, like clicking the mouse.
Chicagolooper
ugh... Ok. I've figured it out. There was a problem with a template file i've been using. Strange. It's a really old one. Possibly from an AutoCAD 2013 release. I think even older. My drawing was Metric and I believe I chose the Imperial version of the template file I was working with. I started fresh and everything is fine. I'm completely new to the software, so i'm ASSUMING this is what it was. I realized late that I had been given two .dwt's. It's for an assignment. Is that something that actually could be conflicting? Template files? I don't know, apparently so. All is well now. 
Also... I've been trying to juggle around with trying different settings for Grid and Snap. Finding a right balance between the two so i can actually see the snap while NOT being zoomed in extremely close.
If it snaps to grid locations when you are in a command, but not outside of any command, you can get it to snap even when not in a command with the SNAPGRIDLEGACY System Variable.
