You need to be an admin for the page to manage/assign roles.
From your Feed, click Pages in the left menu.
Go to your Page and click Settings in the left menu.
Click Page Roles.
Below Assign a new Page role, type Joe Cornershop or email@example.com in the box and select the person from the list that appears.
Click Editor and select the Moderator role from the dropdown menu.
Click Add and enter your password to confirm.
You must be an admin to assign new roles.
Open your Business Manager settings
Go to the “People” section and click on “Add New People” to add new users
Type firstname.lastname@example.org in the box to select Cornershop Creative
Click on “Assign Assets” and select “Pages”
Select the Page Editor role - Hit the “Save Changes” button
To give access to your Twitter account, you’ll need to use TweetDeck.
Click on More, then Settings and privacy
Click Your Account
Click on TweetDeck Teams on the right-hand side and make sure it's turned on
Login to TweetDeck using your Twitter account credentials
Click on Accounts, then Manage Team
Type @cornershop in the Add team member box
Choose the Admin access level and click Authorize
To give access, you must access your page as a super admin.
Click the Admin tools dropdown at the top of the page and select Manage admins
Click the Page admins tab
Click the Add admin button.
Type Christine Ward (https://www.linkedin.com/in/christinesward) in the Search for a member… text field
Click the correct name from the menu that appears
Select the Analyst role
Go to studio.youtube.com
On the left-hand side, click Settings
Click Invite and enter the email address email@example.com
Click Access and select the Editor role
How to Add Facebook Fundraiser
To allow fundraising for your nonprofit on Facebook:
Sign up to accept donations on Facebook.
On a desktop, log into Facebook and click Settings in the top menu of your Facebook Page.
Click Donations under Fundraisers.
Check the box next to Allow people to create fundraisers.
Check the box next to Allow people to add donate buttons next to their posts.