Hello @Dennisbur,
In order to have your formula with the black sign, right click on your formula column, select "Column Info..." and check that option "Suppress Eval" is not checked :
![Victor_G_0-1676290255493.png Victor_G_0-1676290255493.png](https://community.jmp.com/t5/image/serverpage/image-id/50073i37B5EB4543E8B1F8/image-size/medium?v=v2&px=400)
![Victor_G_3-1676290400551.png Victor_G_3-1676290400551.png](https://community.jmp.com/t5/image/serverpage/image-id/50076i22C7F8CBF04672B4/image-size/medium?v=v2&px=400)
If "Suppress Eval" is checked (or if you select it throught the menu you showed), then the formula will have the grey sign :
![Victor_G_1-1676290346553.png Victor_G_1-1676290346553.png](https://community.jmp.com/t5/image/serverpage/image-id/50074iFFB2B33DC0F1E8BE/image-size/medium?v=v2&px=400)
![Victor_G_2-1676290362516.png Victor_G_2-1676290362516.png](https://community.jmp.com/t5/image/serverpage/image-id/50075iFBCECE69D17B0464/image-size/medium?v=v2&px=400)
Once you have done your changes, click on "OK" and when you're back on the datatable, deselect your formula column (or click on another column) so that the changes are visible and effective.
I hope it is more clear ?
Victor GUILLER
Scientific Expertise Engineer
L'Oréal - Data & Analytics