diff --git a/how_to b/how_to
index 2acd1ce..2fb3d9d 100644
--- a/how_to
+++ b/how_to
@@ -234,6 +234,9 @@ PDF :
         convert [jpg|png|txt|pdf|...] output.pdf
         # Might need to tweak /etc/ImageMagick-7/policy.xml
         # https://stackoverflow.com/questions/52998331/imagemagick-security-policy-pdf-blocking-conversion
+    Create pdf from images losslessly:
+        pacman -S img2pdf
+        img2pdf -o <out.pdf> <in1.jpg..inN.jpg>
     Fill form & annotate:
         For well formatted interactive forms:
             evince
@@ -245,6 +248,7 @@ PDF :
             inkscape
         Batch mode with pdftk:
             # http://www.myown1.com/linux/pdf_formfill.shtml
+            # https://blog.nemirwen.me/posts/batch-pdf-form-filling
             Finding the fields:
                 # pdftk needs java-commons-lang
                 pdftk form.pdf dump_data_fields_utf8 > fields.flds