A search for "keyboard shortcuts" in Money help yielded the following list.
But the quick answer to your question is "ctrl-M" will mark a transaction as
cleared in the advanced register. "ctrl-shift-M" will mark it reconciled.

Keyboard shortcuts
Keyboard shortcuts allow you to quickly access and use features without
using a mouse.

To Press
Copy text CTRL+C
Insert today's date in the Date field CTRL+D
Create a scheduled payment or deposit from a selected transaction in
the account register CTRL+E
Find a transaction CTRL+F
Find and replace CTRL+H
Open the Windows Calculator CTRL+K
Mark a transaction as cleared CTRL+M
Create a new file CTRL+N
Open a file CTRL+O
Print CTRL+P
Split a transaction CTRL+S
Switch between the Top Line Only and All Transaction Details views in
the account register CTRL+T
Paste text CTRL+V or SHIFT+INSERT
Cut text and place on clipboard CTRL+X
When entering a new transaction in a register, use information from
the same field in the previous transaction CTRL+Y
In the account register, undo delete CTRL+Z
Go to the same field in the previous transaction in the account
register CTRL+UP ARROW
Go to the same field in the next transaction in the account register
CTRL+DOWN ARROW
Copy text CTRL+INSERT
Go to the account list CTRL+SHIFT+A
Go to the Bills summary page CTRL+SHIFT+B
Go to Categories & Payees List CTRL+SHIFT+C
Go to Portfolio Manager CTRL+SHIFT+I
Mark a transaction as Reconciled (R) in the account register
CTRL+SHIFT+M
Go to Planning CTRL+SHIFT+P
Go to Reports CTRL+SHIFT+R
Go to Tax Center CTRL+SHIFT+T
Open Help pane F1
Find and replace F3
Open or close selected drop-down list F4
Refresh Money's Web browser F5
Switch focus between the toolbar and the main window F6
Convert an amount to a foreign currency when the insertion point is in
an amount field F8
Switch focus to or from feedback pane in account register F9
Go to Money home page ALT+HOME
Back ALT+LEFT ARROW
Forward ALT+RIGHT ARROW
Undo last typing ALT+BACKSPACE or CTRL+Z
Close Money ALT+F4
Increase a date by one Plus sign (+)
Decrease a date by one Minus sign (-)
Cancel changes ESC


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"Tim in Portland" <timothy_p_ryan[at]verizon.net> wrote in message
news:qWmLe.58$I56.36[at]trndny06...
- quote -

Is there any lists of keyboard shortcuts, specifically a shortcut to clear
transaction in my checkbook.

Thanks,

Tim in Portland