Common IBM Home Page Reader keyboard commands include:

IBM Home Page Reader Keyboard Shortcuts
Action Keystroke Comments
Play Space bar  
Stop Speech Control  
Cancel Connection Escape  
Next Element Right Arrow Depends on reading mode (Links, Headings, Table Navigation, etc.)
Current Element Down Arrow

Depends on reading mode (Links, Headings, Table Navigation, etc.)

Previous Element Left Arrow Depends on reading mode (Links, Headings, Table Navigation, etc.)
Beginning of Current Element Home Depends on reading mode (Links, Headings, Table Navigation, etc.)
End of Current Element End Depends on reading mode (Links, Headings, Table Navigation, etc.)
Accesskey Alt + Shift + "Letter"  
Activate a Link or Control Enter Required to enter text or activate control
Next Link or Control Tab  
Previous Link or Control Shift + Tab  
Next Page in History--Forward Alt + Right Arrow  
Next Page in History--Back Alt + Left Arrow  
Home Page Alt + Home  
Refresh Page F5 orControl + R  
Help F1  
Page Summary Control + F1 Describes the number of links and headings
Where Am I? Alt + F1 Describes current location in table or on page
Current Table Cell Spacebar  
Top of Page Control + Home  
Bottom of Page Control + End  
Undo Jump Control + Page Up  
Next Block of Text or Links Control + Down Arrow  
Previous Block of Text or Links Control + Up Arrow  
Current View and Reading Mode Control + F6  
Reading Modes Menu Alt + R or F4 Permits choice of reading modes: links, items, words, characters, headings, controls, table jump, windows cursors or table navigation
Links Reading Mode Alt + L Moves cursor from link to link
Table Navigation Reading Mode Alt + T Skip to Table Navigation Keystroke Table. Return to this table by clicking Alt + R.
Headings Reading Mode Alt + 1 Moves cursor from heading to heading
Frame Set Dialog Box Control + E Shows frame titles and provides links to them
Show Links List Control + L Shows link titles and provides links to them
Show Accesskeys Alt + K  
HTML Source Control + U  
Begin Selection in Text View Contol + B  
End Selection in Text View Control + D  
Navigation Keys for Tables
Action Keystroke
Current Cell Spacebar
Previous Cell in Row Left Arrow
Next Cell in Row Right Arrow
Previous Cell in Column Up Arrow
Next Cell in Column Down Arrow
First Cell in Row Home
Last Cell in Row End
First Cell in Table Control + Home
Last Cell in Table Control + End

Source: IBM Home Page Reader Short List of Keys document