How can I make a tab open in the current fast dial page?

In the open in setting in Preferences you can select to open in current tab, background tab or new Tab.
This setting will effect how cells open in Fast Dial.

Does this work for you ?

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The other setting on that same page "Show Fast Dial in new Tabs", has an effect only on how Fast Dial itself opens.

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in the FAQ, it said I can choose thumbnail quality,but there is no same option in 2.22b,why?

I apologise for that.
In earlier Fast Dial Versions, there was an option to use different scaling methods.
There were problems with Java so Java was dropped.
Userlogos as a scaling options was also dropped for bandwidth problems.

In 2.22b there is only one scaling option.
In the next Version the quality of the logos will greatly improve, and it is also hoped to bring back the Java scaling option too quite soon

Many thanks

I have three options in "open in" ,i.e.,nothing but blank(I suppose it is open in current page as you said),new tab,background tab
the latter two work(open in a new tab and switch to it for new tab, and open in a new tab but stay in fast dial tab),but the first one just dont work,nothing happened after I clicked any dial in the tab...
.

Please see the post here

Are you using the Extension Tab Mix Lite ?

If you are maybe that is the cause of the problem.

Many thanks

The tab mix lite is the cause... I have to find another extension for color tab...
THX

Many thanks for the feedback.

I am glad to hear that the cause of your troubles has been revealed.

Good Luck !

Many thanks