How to input data when the form has attribute dimension?

Hello everyone,

I have the input form.

But I realise that when I drag the attribute dimension to row/column/POV or pages, I cannot input data on that form although my attribute member is the lowest level.

For example:

If I drag my Attribute dimension "Store Banner" to the column:

All my form will be read-only form.

So my question is:

Is there any way to input on the form if the form has an attribute dimension?

When showing the reason for read-only cell, it showed "Security"

How to turn off this security?

Thanks and have a nice day!