diff --git a/manual/tracy.tex b/manual/tracy.tex
index 46b20e11..7c6219bb 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -2828,6 +2828,8 @@ If automated call stack sampling (see chapter~\ref{sampling}) was performed, add
 
 Instruction timings can be viewed as a group. To begin constructing such group, click the \LMB{}~left mouse button on the percentage value. Additional instructions can be added using the \keys{\ctrl}~key, while holding the \keys{\shift}~key will allow selection of a range. To cancel the selection, click the \RMB{}~right mouse button on a percentage value. Group statistics can be seen at the bottom of the pane.
 
+Clicking the \MMB{}~middle mouse button on the percentage value of an assembly instruction will display call stack parents of the selected sample (see chapter~\ref{sampleparents}). This functionality is only available for instructions that have collected sampling data, and only in the assembly view, as the source code may be inlined multiple times, which would result in ambiguous location data.
+
 Sample data source is controlled by the \emph{\faSitemap{}~Function} control, in the window header. If this option is disabled, the sample data represents the whole symbol. If it is enabled, then the sample data will only include the selected function.