float$annotOpacity =0.5
Default Opacity for Annotations;
Value
0to ≤1
Suggest0.5 if using in-line with text, or1 if using in the margins (with annotMargin < >0)
Default:0.5
Set at document initiation
<?php$mpdf=new\Mpdf\Mpdf(['annotMargin'=>5,'annotOpacity'=>1]);