OTBI Analysis: How can we enable Multiselect for a table prompt?

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Hello,

 

As you can see in my screenshot, I want to enable the multiselect for a table prompt.

PS1: I can't use dashboard for my need.

PS2: I can't use the Prompt TAB (in the analysis), even if it's a good idea, but we select the values of prompts once, than, prompts disappear (only if someone knows how to make them appear permanantly).

 

Best regards,

Ilyas