Your planning grid will list all the codes in your chart of accounts as they appear in your accounting system. For example this code here called Pasture renewal.
If you want to change the display name from Pasture renewal to something else you will need to go to the chart of accounts in your accounting software and edit the name using the following help resources depending on your local market.
Once you've made those changes in your accounting software you'll need to head back to Figured and run a manual sync to pull those updates through. If you are unsure how to do that, head to this help article.