You can automatically share your issue on publishing, you may connect your Facebook/Twitter account to your Joomag account and each time you publish a new issue in Joomag it will get published automatically with your Facebook/Twitter account.
Note: It is assumed that you are in My Magazines.
Step1. Go to Account Settings > Sharing.
Step2. Connect your Joomag account to your Facebook/Twitter accounts.
Step3. Now that you have connected your account, once you publish your new issue it will be shared automatically with your social network.