Summary
When you first load Forecast Manager, you will see an area at the upper left of the screen with a few icons and tabs.
Screen Features
Width Icons
The three icons at top, showing a combination of a tree icon and a chart icon, allow you to dynamically resize the split of your screen to make the selection tabs area wider, or narrower.
Selection Tabs
From left to right, these are:
Nodes Tab - this tab has all the matching hierarchy nodes for your selected hierarchy level, e.g. all of your item-sites, or all of your item-site-forecast groups. If you change your hierarchy level in the Display Options, the contents of this grid will change. Entering filters will filter down the contents of this grid. This tab allows multi selection of rows. Use CTRL, SHIFT, ALT-A. Right click on selection to bring up 'Load Selection' option.
Item-Site Tab - for ease of use, this second tab always shows all item-sites matching your current filters. So, if you are hybrid forecasting, or even have a customer-focused hierarchy with customer attributes above item-site, this will always show the sum of your item-site forecast.
Hierarchy Tree Tab - Shows your forecast hierarchy in tree format so that you can drill down and visualize your forecast hierarchy. You can use the search function if you do not know what path you are looking for.
Recently Used Tab - Shows any recently clicked on hierarchy nodes. This includes selections at any level of the hierarchy that you have recently used. This is tied to your user ID and is not global.
Troubleshooting
Why don't I see my item in Forecast Manager?