Hi everyone can anyone tell me how to create message window when i fill up form . when someone filled specific situation give them specific message based on my google sheet .

i am creating health monitoring app where i want to indicate color code like hemoglobin is less then 12 color would be green else red i have two conditioning normal or critical see in image please help me to create rule for it if normal condition is ...

Please tell me if any way to remove -+ sign from the number datatype textbox.