Here are the simple, reliable steps to unhide columns in Microsoft Project:
- Open your Microsoft Project file and select a column you want to hide.
- From the menu, select 'Hide Column'.
- Then, right click a column header in Microsoft Project.
- From the menu, select 'Insert Column'.
- In the new column, type the name of the column you want to unhide.
- Once you have chosen a column you want to unhide, click or type the column name in the header.
- Now, the column is restored and visible again.



