I'm unable to typeset the big "evaluated at" sign for derivatives and definite integrals

#1

I’m on Mac OS.

I’m simply trying to write the “evaluated at” sign for definite integrals and derivatives.

When I type the “pipe” symbol, I can tab until it becomes large. But when I subscript it, the size of the bar shrinks again.

My steps:

  1. Type “|”
  2. Type Tab until the big separator appears
  3. Type “_” to get a subscript [at this point, the separator shrinks]

See this video: https://imgur.com/a/bWwqH7A

#2

Hi @alecstein

the following steps work for me on Linux:

  1. ALT + L | (you get two vertical bar)
  2. Type at least one char inside the vertical bar
  3. Delete the left “|”

Now you can add the subscript on the right bar without cause it to shrinks

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#3

@mutable, this does not work on MacOS. Maybe it’s a bug. As soon as I add the subscript, the bar shrinks to the size of a normal, small “|”.

Here’s a video:

https://imgur.com/a/bWwqH7A

#4

Please follow the steps above.
You must to insert two vertical bars and, after typed inside at least a char, delete the left bar.
I think this behaviour of Texmacs is correct because inserting just a single text bar is ambiguous in order to match the desired height.

#5

@mutable

I now understand what you mean. I have to put the derivative inside the two pipes, then delete the left pipe. I got it to work that way. Thank you.

2 Likes