Editing GRBL settings after upgrading z axis

Hi Folks… feel really stupid asking but how do I get to the page where I can edit my GRBL settings. I recently upgraded to a CNC4 newbies slider and need to edit… Thanks in advance

In Easel, go to Machine -> Advanced -> Machine Inspector. In the console, send “$$” to get all your current parameters. $102 is your Z-axis steps/mm. To change, just send “$102=###” with the appropriate number value.