I scourged the forum looking how to do the following:
1. I have old tree measurements (DAP - Diameter at breast height from previous census) and I need to capture new DAP measurements. Sometimes, when you measure a stem, you type the wrong number (higher or lower than the previous).
2. I can do a calculate field and compare the old DAP vs the new DAP and if this is more than 50mm, issue a warning or show a message.
3. How can I display such a warning or message to the field crew?