After an item is created you can always upload a document from your computer to use as a cover sheet instead of the automatically-generated cover sheet.
Go to the item screen for the subject meeting.
On the left side of the screen, find the Item Data block.
Find Using cover sheet. If your access privileges allow you to change the cover sheet settings, the switch to the right will be enabled.
If the switch to use a cover sheet is not on, click it to turn it on.
When you turn on using a cover sheet, the message below the cover sheet switch will indicate if you are using the automatic cover sheet or an uploaded one.
If you are using the automatic cover sheet, click the Upload a document to use for cover sheet instead link.
When the cover sheet choice box appears, choose Upload a document to use for the cover sheet.
Choose a file from your computer.
Click the Change Cover Sheet Settings button.
What are cover sheets?
How do I stop using a cover sheet for an item?
How do I start using a cover sheet for an item?
How do I use the automatically-generated cover sheet for an item?