This is the Enter Data window, where you'll be able to enter new investments, as well as view and modify existing ones.  By clicking any button except Current Market Value, you will open a window to let you manage individual investments.  While the window will appear the same for each one, the investments will be limited to only the currently open items of that type.

The Current Market Value button is a table that allows quick insertion of market value figures.  It will also give you a total of the gain/loss of the market value to post to the 94500 account.