Schematic Editing: http://techdocs.altium.com/display/ADOH/Schematic+Editing+Essentials
Design Objects - Any visible component displayed in the Schematic Editor, these are placed by pressing LMB and can be rotated by pressing Space
Graphical Objects - Lines, arcs, text, boxes
Electrical Objects - Parts 
, wires 
, buses, ports
Grids - For ease of navigation and object placement, interactive grids will lock cursors to their vertices; to edit these grids, go to Tools >> Schematic Preferences
Visible Grids - Adds a non-interactive visible grid to the schematic
Snap Grids - Locks the cursor to its vertices when placing/moving design objects
Electrical Grids - Ignores the snap grid and locks the cursor to its vertices when making electrical connections between design objects
Designators and Annotation
PCB Editing: http://techdocs.altium.com/display/ADRR/PCB_Edtr-PCBEditor((PCB+Editor))_AD
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