diff --git a/roles/moodle/defaults/main.yml b/roles/moodle/defaults/main.yml
index 193c21d64..23be708e0 100644
--- a/roles/moodle/defaults/main.yml
+++ b/roles/moodle/defaults/main.yml
@@ -10,6 +10,10 @@
 moodle_version: 311
 moodle_repo_url: https://github.com/moodle/moodle
 #moodle_repo_url: git://git.moodle.org/moodle.git    # 2020-10-16: VERY Slow!
+
 moodle_base: "{{ iiab_base }}/moodle"    # /opt/iiab
 moodle_data: "{{ content_base }}/moodle"    # /library
-moodle_database_name: moodle
+
+moodle_db_name: moodle
+moodle_db_user: Admin
+moodle_db_pass: changeme
diff --git a/roles/moodle/tasks/install.yml b/roles/moodle/tasks/install.yml
index aa763be59..66dd5cb74 100644
--- a/roles/moodle/tasks/install.yml
+++ b/roles/moodle/tasks/install.yml
@@ -20,12 +20,13 @@
 # 2021-07-02: Let's monitor & learn from these 2 pages year-by-year:
 # https://docs.moodle.org/19/en/PHP_settings_by_Moodle_version#PHP_Extensions_and_libraries
 # https://github.com/moodlebox/moodlebox/blob/master/roles/packages/vars/main.yml
-- name: Install ghostscript + libsodium23 + 8 PHP packages (run 'php -m' or 'php -i' to verify)
+- name: Install ghostscript + libsodium23 + poppler-utils + 8 PHP packages (run 'php -m' or 'php -i' to verify)
   package:
     name:
       #- php-apcu                        # 2021-07-02: Experiment with fewer dependencies
       - ghostscript                      # 2021-07-02: OPTIONAL -- but useful for annotation of PDF's / assignments
       - libsodium23                      # 2021-06-28: Likewise installed in nginx/tasks/install.yml via php{{ php_version }}-fpm AND httpd/tasks/install.yml via libapache2-mod-php{{ php_version }} AND wordpress/tasks/install.yml -- it can ALSO be auto-installed by phpX.Y-cgi OR phpX.Y-cli as confirmed by 'apt rdepends libsodium23' -- Recommended by Moodle 3.11+ at https://docs.moodle.org/311/en/Environment_-_PHP_extension_sodium -- whereas https://www.php.net/manual/en/sodium.installation.php says it's always bundled with PHP 7.2+ -- VERIFY USING 'php -i | grep sodium' AND 'apt list "*sodium*"'
+      - poppler-utils                    # 2021-07-20: Convert PDF to PNG, with pathtopdftoppm set below (#2854)
       #- php{{ php_version }}-common     # 2021-06-27: Auto-installed as an apt dependency.  REGARDLESS: php{{ php_version }}-common superset php{{ php_version }}-cli is auto-installed by php{{ php_version }}-fpm in nginx/tasks/install.yml
       #- php{{ php_version }}-cli        # 2021-06-27: Compare to php{{ php_version }}-common just above!  2020-06-15: In the past this included (below) mbstring?  However this is not true on Ubuntu Server 20.04 LTS.
       - php{{ php_version }}-curl        # 2021-06-27: Likewise installed in nextcloud/tasks/install.yml, pbx/tasks/freepbx_dependencies.yml, wordpress/tasks/install.yml
@@ -72,21 +73,21 @@
     name: postgresql-iiab
     state: started
 
-- name: Create PostgreSQL db user Admin/changeme
+- name: Create PostgreSQL db user {{ moodle_db_user }}/{{ moodle_db_pass }}
   postgresql_user:
-    name: Admin
-    password: changeme
-    encrypted: yes   # Required by PostgreSQL 10+ e.g. Ubuntu 18.04's PostgreSQL 10.3+, see https://github.com/iiab/iiab/issues/759
+    name: "{{ moodle_db_user }}"    # Admin
+    password: "{{ moodle_db_pass }}"    # changeme
+    encrypted: yes    # Required by PostgreSQL 10+ e.g. Ubuntu 18.04's PostgreSQL 10.3+, see https://github.com/iiab/iiab/issues/759
     role_attr_flags: NOSUPERUSER,NOCREATEROLE,NOCREATEDB
     state: present
   become: yes
   become_user: postgres
 
-- name: 'Create database: {{ moodle_database_name }}'
+- name: 'Create database: {{ moodle_db_name }}'
   postgresql_db:
-    name: "{{ moodle_database_name }}"
+    name: "{{ moodle_db_name }}"
     encoding: utf8
-    owner: Admin
+    owner: "{{ moodle_db_user }}"
     template: template1
     state: present
   become: yes
@@ -140,6 +141,9 @@
 
 - include_tasks: mathjax.yml
 
+- name: Run 'php {{ moodle_base }}/admin/cli/cfg.php --name=pathtopdftoppm --set=/usr/bin/pdftoppm' for converting PDF files to PNG (faster than Ghostscript, particularly for large files) -- works with apt package 'poppler-utils' installed above (#2854)
+  command: php "{{ moodle_base }}/admin/cli/cfg.php" --name=pathtopdftoppm --set=/usr/bin/pdftoppm
+
 
 # RECORD Moodle AS INSTALLED
 
diff --git a/roles/moodle/templates/moodle_installer b/roles/moodle/templates/moodle_installer
index be6b18bf6..2234af0a2 100755
--- a/roles/moodle/templates/moodle_installer
+++ b/roles/moodle/templates/moodle_installer
@@ -10,7 +10,7 @@ sudo -u {{ apache_user }} \
     --wwwroot=http://{{ iiab_hostname }}.{{ iiab_domain }}/moodle \
     --dataroot={{ moodle_data }} \
     --dbtype=pgsql \
-    --dbname={{ moodle_database_name }} \
+    --dbname={{ moodle_db_name }} \
     --dbuser=Admin --dbpass=changeme \
     --fullname=Your_School \
     --shortname=School \