Tab labels width and the navigational arrows...

I was wondering how the tab pages and the labels (number of characters in the label) have an affect on the navigational arrows on the upper left hand of the tab pages.

The problem is that I grabbed an already existing 11 tab canvas and deleted 2 tabs and added 2 different one's, all of a sudden the appearing width became fixed and changed to showing only 11 or 12 characters without showing the navigational arrows. I added 10 more tabs to check and the arrows appeared but the width was still fixed. The problem is that I want to see the whole label but can't because I am only seeing the first 11 or 12 characters ( 11 or 12 depending on width of the character " i and m don't have same width " ).

Is there a way to have the tabs showing the whole label and show the arrows ?

Here is the visual.

BEFORE
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|Year report | Last years report | Research | Expenses ||<--|-->|
|____________|___________________|__________|__________||___|___|
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         ( Canvas area )                            | |
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AFTER
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| Year rep... | Last yea... | Research | Expenses |
|_____________|_____________|__ _________|_____________|_________
| | |

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               ( Canvas area )                         | |
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