Bulletproof data entry: In-cell dropdown lists, restricting dates, numeric ranges, and custom Stop/Warning error popups.
“Data Validation Dropdowns, Input Messages & Error Alerts” is part of Level 1: Excel Fundamentals — Basic to Intermediate. Free preview lessons are open to everyone; the remaining lessons are for enrolled learners.
Module 5: Decision Logic, Error Handling & Excel Tables
Module 6: Data Tools & Mini-Project: Salary Sheet + Expense Tracker
