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comment Beamer — Showing subsections for the current section in sidebar
@AryaMz You're welcome, I converted my comments into an answer so that we can remove this question from the list of unanswered questions.
Dec
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answered Beamer — Showing subsections for the current section in sidebar
Dec
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awarded  Enlightened
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comment Beamer — Showing subsections for the current section in sidebar
Try to use hideothersubsections as a global option: \documentclass[hideothersubsections]{beamer}.
Dec
27
comment Beamer — Showing subsections for the current section in sidebar
have you tried hideothersubsections as a theme option?
Dec
27
answered Vertically center tikzpicture in table
Dec
27
comment How to resize and remove the gap between arrow heads?
no problem. I edited the title so that (hopefully) the question will be helpful to more future readers. Feel free to rollback my edit if you disagree.
Dec
27
revised How to resize and remove the gap between arrow heads?
edited title so to make the question more straightforward
Dec
27
answered How to resize and remove the gap between arrow heads?
Dec
27
comment How to resize and remove the gap between arrow heads?
I see what you mean now. For the missing brackets, I mean that {Bar[width=1cm]<}-{>Bar[]} works, while {Bar[width=1cm]<->Bar[]} does not (this is for your second question).
Dec
27
comment How to resize and remove the gap between arrow heads?
which arrow head is not equal? They seem to be all the same size to me. For the length and width options, you are missing some brackets, I think it should be {Bar[]<}-{>Bar[]} and {Bar[]Straight Barb[]}-{Straight Barb[]Bar[]}
Dec
26
answered Fading effect in navigation bar
Dec
25
answered Adding background color to active sections of beamer sidebar
Dec
22
comment Animate Options label,nomouse,step
Welcome to TeX.SE! Could you show us a compilable snippet of code that triggers the error?