List; conditional formatting; null value

[Joseph Nierenberg]

I have a list in an SPO subsite. It was created from the Microsoft Lists page on a task list template, and customized. Items are added in three ways: manually; a Flow from Exchange e-mail; and a Flow from Exchange tasks. When items are added by either Flow, certain fields in the list are left blank, because the source data does not contain the necessary information. I would like to apply conditional formatting to those items to make it quicker to find them and complete the information manually. I can't find any way to complete a condition for a null value. I don't know JSON, so I'm trying to use the natural language dialog. I've tried two single quote marks without a space between them; I've tried the word 'empty' inside parentheses; neither works. (It doesn't matter whether the entire line or just the one field is conditionally formatted.) Is it possible to do?

[#2]

@Joseph Nierenbergon modern sites you are able to use column formatting option.
https://www.youtube.com/watch?v=oKb-KZl8Myw

Also steps which you may takes are to highlight whole row :
Click column header >Column settings>Format this column

then choose Format view>Conditional formatting
Then you can define your rules where under the Values filed there is an option (Empty)

This way you can format you column without any JSON

[#3]

There is no option (Empty).

[#4 · Accepted solution]

@Joseph NierenbergMaybe depends on the column type 

, if there is no option (Empty) then leave it blank. Always you can do workaroud and if the item is created by the flow just insert - (dash) and the you can use it as a filter in you column formatting. Dash can be changed later on once the item is edited.

[#5]

"if the item is created by the flow just insert - (dash) and the you can use it as a filter"
@MarekSkalinski Of course! Thank you. Works well.

[#6]

Such a great easy workaround - thank you! @Joseph Nierenberg