To grant permission for others groups to see a page you must

Go to the page

Click on the wrench icon 

Choose Access

It will display an area with two sections.  THe first is the group of people specific to just that area

The second part is the default roles in MyPark

If you want to make the page visible to all staff find Staff

and the red eye with the mark means do not show this page, click on that and this will pop up

If you click the hidden button, it will change visible and people can see it.

Do NOT change the no to a yes for Allow this role to manage this page.  That would permit anyone in that role to upload, change, delete, alter the web page.