I am making a single line diagram on huge paper size. at least 5000 plus mtext are used in the drawing. but the issue is that when I convert my drawing from AutoCAD to pdf and try to find text in pdf with ctrl+f..... but always failed to find any text..I have check all the pdf options in plot manager but couldn't found any solution.

This article explains why text in a PDF created by AutoCAD may not be searchable and what one has to do to fix the problem.How to create selectable and searchable text in a PDF from AutoCAD | AutoCAD 2021 | Autodesk Knowledge Network