水野史土

In a multisite, you can create child sites. When you create a new child site, you fill in the title and the slug. And, you have to fill in your e-mail address, even if you are the network administrator.
If you enter an e-mail by hand, you may mistype. But, you can avoid such a risk. This code, shown below, automatically fill your e-mail address into the corresponding box, with an aid of jquery.

Preset Admin Email for Multisite

hen you create a child site, this plugin automatically fill your e-mail address into the corresponding box, with an aid of jquery.

cedbv

Don’t Work in WordPress MU. WordPress 3 only. 
Usefull only if you have a multisite install and if some users manages more than one blog.
This plugin adds a simple dropdown menu in administration header that allows you (and every site users) to switch 
between administration of every site they are member of (and so work for super-admin, admin, contributors,…).
Work best if the plugin is Network Activate.

Multisite Switcher

In a multisite configuration, add a dropdown menu in administration to let you switch between sites admin.

Preset Admin Email for Multisite vs Multisite Switcher