Add watermark example

1 files changed, 5 insertions, 0 deletions

diff --git a/fpdf.go b/fpdf.go
index adc510b..7294df7 100644
--- a/fpdf.go
+++ b/fpdf.go
@@ -430,6 +430,11 @@ func (f *Fpdf) SetHeaderFuncMode(fnc func(), homeMode bool) {
 // headers. fnc will typically be a closure that has access to the Fpdf
 // instance and other document generation variables.
 //
+// A header is a convenient place to put background content that repeats on
+// each page such as a watermark. When this is done, remember to reset the X
+// and Y values so the normal content begins where expected. Including a
+// watermark on each page is demonstrated in the example for TransformRotate.
+//
 // This method is demonstrated in the example for AddPage().
 func (f *Fpdf) SetHeaderFunc(fnc func()) {
 	f.headerFnc = fnc