I have a vintage Sears The Graduate typewriter,

Clearing tabs and margins on a Nakajima typewriter can vary depending on the model, but here are some general steps to follow:

1. Turn off the machine and unplug it.
2. Locate the tab and margin set buttons on the typewriter. These are typically located on the front or top of the machine, and may be labeled as "Tab Set," "Margin Set," or similar.
3. Press and hold the tab and margin set buttons while turning on the machine.
4. Release the buttons once the machine has powered on.
5. The tabs and margins should now be cleared.

You can also consult the manual of the machine, it should have instructions on how to clear the tabs and margins on your specific model.
It's important to note that clearing the tabs and margins on a typewriter will also reset other settings, such as line spacing and paper position, so you may have to adjust these settings again.

Tab set and release same button look on keyboard

You probably have the L. margin set there. Return to that point, press but don't hold the MAR REL key, backspace to desired location, press L. MAR key.

DickyO

I have a manual...
To clear margins and have do the following: depress the "return" key so the carriage returns to the left margin. Then depressed the "code" "tab clr" keys.
To set margins and tad do the following: clear your margins in tabs using the steps above. Depressed space bar until you reach the desired left margin. Depressed the "L. MAR" key... you're left margin is now set. Depress the "space bar" until you reach the first required tab stop. Depressed the "tab set" key... your first tab stop is now set. Repeat steps 4and 5 for each tab stop required on the writing line up 13 can be set on each line. Depress the spacebar to move the carriage to the desired right margin. Depressed the "r. mar" key. Finally depress the return key.

There are 3 margin keys on the keyboard of this typewriter. One is marked Mar Left, one is Mar Right, and the third is Mar Rel(ease) these are found on the left side of the keyboard, Have you tried either of these? Hope this helps

To clear alltabs; tab allthe way to the right, hold the tab clr key press return.
T set margin Go to L. mar, press mar rel key, space or backspace to desired location, press l. mar key.

DickyO

The "tab" is probably the R. margin. Go to it press mar rel key space or backspace to the desired location, press R. mar key.

DickyO

The "tab" is probably the R. margin. Go to that point, press margin rel, space to the place you desire, press R mar key.

DickyO

From the User's Manual:

Margins and For each setting, move point. key(s) indicated:
• LMar to set left margino
• RMar to set the right margino
• MarRei to the!" left of the margino
• TSet to set a tab. Vou set at the left and right margins. Vou • TClr to clear a tab.
• TClr + CRln elear ali The earrier does not margino when the carrier is tive margino Vou type or space through ríght margino saved when the oft.
Tabs
the carrier to the desired point, and press the
the margin.
margin.
MarRel release the left margin, ther Backspace or +- to move
margi n.
You can up to 26 tabs. Permanent tabs exist
You cannot clear these tabs.
CRtn to clear all tabs.
carrier lock at the right margin. The typewriter beeps
about five spaces before the right margin. You can
the right margin. Margin and tab settings are
typewriter is turned.

You can download the User's Manual from LEXMARK:
http://images.lexmark.com/publications/pdfs/2007/index/en.html

Look for the title 'IBM Typewriters' at the end of the page, open the list box and select your typewritter model.

On the L. side of the T/W ketboard are the keysmar left, mar right,tab set, tab clear and mar rel. Space to the location thayou want th R. mar and press right mar key, if it stops at the R. mar. press and release the mar rel key. To clear tabs tab to the one you want cleared and press tab clear. To set a tab space to the position and press tab set.

DickyO