Aligning text on edge

I cannot figure out why the text on the edge is not entered. What am I doing wrong?

documentclass[margin=1mm]standalone usepackagetikz usetikzlibrarypositioning begindocument begintikzpicture node[rectangle,draw,minimum width=1cm, minimum height=1cm] (r1) ;; node[rectangle,draw,minimum width=1cm, minimum height=1cm, right=3cm of r1] (r2) edge[<-,thick] node[above,text width=1.5cm, align=center] Asynchronous\[-3pt]replication (r1); endtikzpicture enddocument

enter image description here

1 Answer
1

Remove text width setting:

text width

documentclass[margin=1mm]standalone usepackagetikz usetikzlibrarypositioning begindocument begintikzpicture node[rectangle,draw,minimum width=1cm, minimum height=1cm] (r1) ;; node[rectangle,draw,minimum width=1cm, minimum height=1cm, right=3cm of r1] (r2) edge[<-,thick] node[above, align=center] Asynchronous\[-3pt]replication (r1); endtikzpicture enddocument

enter image description here

A 1.5 cm text width is smaller than the width:

enter image description here

Thank you very much; I thought that would allow the multiple lines, but it is not the case.
– ozsu
Aug 25 at 13:44

@ozsu You're welcome, you can do that, but you need to have the enough length set for text width, and the \[-3pt] won't be needed for line breaking.
– jak123
Aug 25 at 14:54

text width

\[-3pt]

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