They hid the setting box for that, in an update last year... Making that setting inaccessible for some users, Confusing or forgotten or wholly overlooked for other users, an extra step for every Token that you set up, and does not seem to follow any User Interface best-practices standards. It's just a random quirky weird GUI that Roll20 made-up out of the blue, kind of like a video game easter egg where you have to click just the exact right pixel and hold your smile just the right way or you lose. If you pay a roll20 subscription and get API access, there is a community-created API Script by The Aaron that he's provided for free to Roll20 users in the One-Click drop-down, called TokenMod which makes it much easier and relatively intuitive to command-line Show Nameplate to everyone (once you learn to type in the command code to control TokenMod API). You set up your own Macro Quick Bar button with the !token-mod command words, after that it's just simply 1 quick click on any token or group of tokens to make them all consistently share the same Show-Name settings.