Display setting - Cannot enable both 'Created By' & 'Created Date' at the same time.

You have run out of available space in the ticket.

Display settings for issues and processes

You can customize how issues and processes are displayed in a list, but there is a limit to how much information can be shown in a ticket.

There is a maximum of 1 image, 3 lines and 2 labels in every ticket.

Each piece of information occupies a specific spot in the ticket. Certain options will be disabled if that space is full.

Free up space for the most important information

Showing everything in a ticket makes it hard to scan through the list. In general, you should only keep the most important information in the list. You can always see the rest of the information when you select an item.

In the case of not being able to select both "Created by" and "Created date", you have used up all the space on the first line. To free up space, start unchecking other pieces of information until both options become available.

If you do not know which ones to uncheck, just uncheck everything and start over by adding only the information you need.

But the information I need are all in the same spot

Please open a feature request explaining your use case. We will try to improve the system the best we can.