Hi!

I am using this formula (used both IS_NULL and IS_EMPTY) to hide List Section Header “STEOP”, if I am typing in input field, and to show it if input field is empty.

It is hiding when I start to type, but not showing up again, if I remove all characters from Input field.

What am I doing wrong?

Hi!

I think it would be best to to just toggle the `visible`

property of the **List Section Header** instead of tracking the **onChange** event. There’s also some issues with **set component property** that we are fixing, so it work a bit unreliably at the moment. Go into the advanced properties of the **list section header** and set its visibility to the formula you already have it should work!

Thank you, Cecilia !

hello Cecilia_Berg could you explain to me

How to Hide the Button if the entry is empty?

Hey,

Set the button’s visibility (under advanced properties) to the formula `!IS_EMPTY(input_variable)`

. Just replace `input_variable`

with whatever the variable name that is bound to your input.

thanks

you helped me a lot

Could you explain one more thing to me how I can add 2 whole numbers,

I can do division, multiplication and subtraction

but the sum I can’t

these are the formulas I used to try to add

if you can help me i appreciate it

and once again thank you very much

Hi,

Looking at the description for the SUM formula, you can see that the values need to be separated by a comma. So Try `SUM([pageVars.N1,pageVars.N2])`

and it should work.