Is there any way to attach more than one file to a message on the site announcement page?
When I create a topic, I can only attach one file.
Go to the Forum administration > Edit settings, scroll down to "Attachments and word count" and change the number for "Maximum number of attachments"
If you CAN'T change it there, it's been restricted globally - so go to Site administration > Plugins > Activity modules > Forum and change the number for "Maximum number of attachments".
The announcements area on the site home page is also a forum activity so you can do as Jon suggests and change the maximum number of attachments.
Yes, it's not so easy to find the setting!
Please try the following:
You should then find the maximum number of attachments setting (finally!)