Edit landing page option

Hi, I have several offers(11) and try to edit landing page according to the manual - "if your landing page displays three offers, you'll need to add click links that end with /click/1, /click/2 and /click/3. You will then need to add/edit the LP in BeMob and set the "Number of offers" to 3." But can't because this option looks close, can you help me please?

Here is an example https://prnt.sc/n1tvj5 I can't change it