Location
Panel
3D Viewport ‣ Header ‣ Tool Settings

Actions

Scale Up/Down
Makes the grid smaller or bigger, multiplying or dividing its current size by 2 (default) to double or half it

Increment
Makes the grid smaller or bigger by adding or subtracting a specified value

Reset
Resets the grid to the default scale of 1 meter cubed (default)

Settings

Addon Preferences

Default Size

The scale of the grid that will be returned to if the Reset button is used

Display Types
The type of resizing settings to display in the 3D Viewport UI, either Incremental, Scaling or both

Scale Steps
How much to scale the grid by, the default of 2 doubling and halving each time. This value is used as “current scale * steps” for Scale Up and “current scale / steps” for Scale Down

Min/Max Value
The biggest and smallest the grid is allowed to be snapped to. Clicking Scale Up or Scale Down will do nothing if the grid is already at its limit.

Increment
How much to change the scale of the grid by each click, used as “current scale +/- increment”. For Imperial units, you can enter “1/12” into this field for one inch increments

Match Areas
Update the scale of all Grids; otherwise, only the Grid located in the same 3D Viewport as the button that was clicked will be scaled

Display Size
Add a text indicator of the Grid’s current size in the 3D Viewport beside the other buttons. The following two settings alter the behaviour of this display

Display Rounding
Rounds the displayed value to a given number of decimal places

Unit Switch
The units of the Display are in meters (or feet if you’re using Imperial units). When this values goes below the threshold set here, the display will switch to using centimetres (or inches).

Setting this value to 0 will ensure the unit is never switched (always use m/feet). Likewise, inserting a value to -1 will force the switch to always be used (always use cm/inches)