GrADS Command: clear

## clear

`clear` (or just `c`)

Issued without parameters, the `clear` command does pretty heavy duty clearing of many of the GrADS internal settings. Parameters can be added to limit what is cleared when using more advanced features.

### Usage Notes

### Examples

`clear norset` clears without resetting user options
`clear events` flushes the events buffer (e.g., mouse clicks)
`clear graphics` clears the graphics, but not the widgets
`clear hbuff` clears the buffered display and turns off double buffer mode
`clear button num` clears button `num`
`clear rband num` clears rband `num`
`clear dropmenu num` clears dropmenu `num`
`clear sdfwrite` clears sdfwrite file name and attributes without resetting other user options (2.0.a3+)
`clear mask` clears contour label mask, which is enabled with the command `'set clab masked'`(2.0.a7+)
`clear shp` clears shapefile output file name and attributes without resetting other user options (2.0.a9+)