Help: the backward/forward arrows?

These arrows

In TCC I issue help echo. The help opens and goes to the ECHO page. Leaving the help alone, I re-activate the TCC window and issue help type. The help switches to the TYPE page. Back to TCC, issue HELP @eval, the help switches to the @EVAL page.

From there, in the help, starting at the @EVAL page, I press the back button 4 times. I am taken, in succession, to ...

the overview page
the TYPE page
the overview page
the ECHO page

At this point...

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