General help

Probably because it's normally recommended that one *not* edit core code unless one knows that they are doing.    But ... since you asked ... there's quite a few html (forms) pages that could (possibly) be edited:

Following command run in a moodle31 code directory.   The one you are looking for is * below.

find ./ -name \*.html

.//admin/mnet/trustedhosts.html
.//auth/cas/cas_form.html
.//auth/cas/config.html
.//auth/db/config.html
.//auth/email/config.html
.//auth/fc/config.html
.//auth/imap/config.html
.//auth/index.html
.//auth/ldap/config.html
.//auth/manual/config.html
.//auth/mnet/config.html
.//auth/nntp/config.html
.//auth/none/config.html
.//auth/pam/config.html
.//auth/pop3/config.html
.//auth/radius/config.html
.//auth/shibboleth/config.html
.//auth/shibboleth/index_form.html
.//blocks/index.html
.//enrol/paypal/enrol.html
.//filter/index.html
.//grade/edit/outcome/course_form.html
.//install/distribution.html
.//install/welcome.html
.//lib/adodb/index.html
.//lib/db/index.html
.//lib/editor/index.html
.//lib/editor/tinymce/tiny_mce/3.5.11/plugins/preview/example.html
.//lib/editor/tinymce/tiny_mce/3.5.11/plugins/preview/preview.html
.//lib/index.html
.//lib/jquery/ui-1.11.4/index.html
.//lib/tests/fixtures/unoconv-source.html
.//lib/xhprof/index.html
* .//login/index_form.html
.//message/search.html
.//message/search_advanced.html
.//message/settings.html
.//mod/data/field/checkbox/mod.html
.//mod/data/field/date/mod.html
.//mod/data/field/file/mod.html
.//mod/data/field/latlong/mod.html
.//mod/data/field/menu/mod.html
.//mod/data/field/multimenu/mod.html
.//mod/data/field/number/mod.html
.//mod/data/field/picture/mod.html
.//mod/data/field/radiobutton/mod.html
.//mod/data/field/text/mod.html
.//mod/data/field/textarea/mod.html
.//mod/data/field/url/mod.html
.//mod/data/preset/imagegallery/addtemplate.html
.//mod/data/preset/imagegallery/listtemplate.html
.//mod/data/preset/imagegallery/listtemplatefooter.html
.//mod/data/preset/imagegallery/listtemplateheader.html
.//mod/data/preset/imagegallery/rsstemplate.html
.//mod/data/preset/imagegallery/rsstitletemplate.html
.//mod/data/preset/imagegallery/singletemplate.html
.//mod/glossary/editcategories.html
.//mod/index.html
.//user/message.html

IF you go down this path, three things:

1. work on a copy of the original .html file

2. know that when you update or upgrade the code there is a good chance your modifications of whatever file will be replaced with the new .html file that comes with updated/upgraded code.

So make notes of modifications made.

3. There is also potential for your modifications not being compatible with update/upgrade ... be prepared for that event as well.

'spirit of sharing', Ken