One of the few things Sigma lacks is a dashboard of current estimates: due dates, links to the estimates, estimator name, etc. Well here is an interesting work around. Many users do not know that all of the info and tabs on the Front page in Sigma can be edited, and it can do many cool things. But a word of caution: don't start making changes until you have copied all the script to a word file so you can restore it when you changes don't work. I'm speaking from experience here.
Go to the Front page tab in Sigma and right click anywhere and click Edit script to open the editor. Right click anywhere in the editor and click on Select All, then copy and paste somewhere safe. Now the fun starts.
In the editor, scroll down to about line 223 - should look like this:
On line 224, copy and paste this: (it will put the button right below the Project Note box)
AddHeader("This button will open your excel dashboard");