Obviously this is a very old post. But a current issue. And I've seen a lot of bad advice on here involving a work-around. DO NOT hide (copy & paste) tiny clouds on each sheet, this is a poor work-around, and causes confusion for others using the file down the road.
It's simple to update "revisions on sheet" for multiple sheets at once. For some reason the "revisions on sheet" property disappears when selecting multiple sheets. However if you expand each sheet in the project browser to show the views on the sheet -- then select all of the sheets again -- the property for "revisions on sheet" remains. This is kind of a pain, but less of a pain than doing one sheet at a time. And far less of a pain for someone down the road dealing with the work-around being suggested by others.
1. Go to Project Browser
2. Expand each sheet by selecting + sign next to each sheet name (will show all views on sheet)
3. Select all sheets you want to update revisions (including views on sheet)
4. Go to Properties and select the "Edit..." box for "Revision on Sheet"
Some people seem to think that you only add a revision to a sheet if it is clouded. Not always the case. An entire set can be reissued with only modified sheets having clouds, but all title blocks updated to show current revision on sheet.