Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

aggregator_form_aggregator_admin_form_alter in modules/aggregator/aggregator.processor.inc
Implements hook_form_aggregator_admin_form_alter().
block_form_form_test_alter_form_alter in modules/simpletest/tests/form_test.module
Implements hook_form_FORM_ID_alter() on behalf of block.module.
block_form_system_performance_settings_alter in modules/block/block.module
Implements hook_form_FORM_ID_alter().
block_form_user_profile_form_alter in modules/block/block.module
Implements hook_form_FORM_ID_alter() for user_profile_form().
book_form_node_delete_confirm_alter in modules/book/book.module
Implements hook_form_FORM_ID_alter() for node_delete_confirm().
book_form_node_form_alter in modules/book/book.module
Implements hook_form_BASE_FORM_ID_alter() for node_form().
color_form_system_themes_alter in modules/color/color.module
Implements hook_form_FORM_ID_alter().
color_form_system_theme_settings_alter in modules/color/color.module
Implements hook_form_FORM_ID_alter().
comment_form_node_form_alter in modules/comment/comment.module
Implements hook_form_BASE_FORM_ID_alter().
comment_form_node_type_form_alter in modules/comment/comment.module
Implements hook_form_FORM_ID_alter().
contact_form_user_admin_settings_alter in modules/contact/contact.module
Implements hook_form_FORM_ID_alter().
contact_form_user_profile_form_alter in modules/contact/contact.module
Implements hook_form_FORM_ID_alter().
dashboard_form_block_add_block_form_alter in modules/dashboard/dashboard.module
Implements hook_form_FORM_ID_alter().
dashboard_form_block_admin_configure_alter in modules/dashboard/dashboard.module
Implements hook_form_FORM_ID_alter().
dashboard_form_block_admin_display_form_alter in modules/dashboard/dashboard.module
Implements hook_form_FORM_ID_alter().
dashboard_form_dashboard_admin_display_form_alter in modules/dashboard/dashboard.module
Implements hook_form_FORM_ID_alter().
dblog_form_system_logging_settings_alter in modules/dblog/dblog.module
Implements hook_form_FORM_ID_alter() for system_logging_settings().
field_ui_form_node_type_form_alter in modules/field_ui/field_ui.module
Implements hook_form_FORM_ID_alter().
form_test_form_form_test_alter_form_alter in modules/simpletest/tests/form_test.module
Implements hook_form_FORM_ID_alter().
form_test_form_form_test_state_persist_alter in modules/simpletest/tests/form_test.module
Implements hook_form_FORM_ID_alter().
form_test_form_user_register_form_alter in modules/simpletest/tests/form_test.module
Implements hook_form_FORM_ID_alter() for the registration form.
forum_form_node_form_alter in modules/forum/forum.module
Implements hook_form_BASE_FORM_ID_alter() for node_form().
forum_form_taxonomy_form_term_alter in modules/forum/forum.module
Implements hook_form_FORM_ID_alter() for taxonomy_form_term().
forum_form_taxonomy_form_vocabulary_alter in modules/forum/forum.module
Implements hook_form_FORM_ID_alter() for taxonomy_form_vocabulary().
garland_form_system_theme_settings_alter in themes/garland/theme-settings.php
Implements hook_form_FORM_ID_alter().
image_form_system_file_system_settings_alter in modules/image/image.module
Implements hook_form_FORM_ID_alter().
locale_form_comment_form_alter in modules/locale/locale.module
Implements hook_form_FORM_ID_alter().
locale_form_node_form_alter in modules/locale/locale.module
Implements hook_form_BASE_FORM_ID_alter().
locale_form_node_type_form_alter in modules/locale/locale.module
Implements hook_form_FORM_ID_alter().
locale_form_path_admin_form_alter in modules/locale/locale.module
Implements hook_form_FORM_ID_alter().
menu_form_node_form_alter in modules/menu/menu.module
Implements hook_form_BASE_FORM_ID_alter().
menu_form_node_type_form_alter in modules/menu/menu.module
Implements hook_form_FORM_ID_alter().
minimal_form_install_configure_form_alter in profiles/minimal/minimal.profile
Implements hook_form_FORM_ID_alter() for install_configure_form().
node_access_test_form_node_form_alter in modules/node/tests/node_access_test.module
Implements hook_form_BASE_FORM_ID_alter().
node_form_block_add_block_form_alter in modules/node/node.module
Implements hook_form_FORMID_alter().
node_form_block_admin_configure_alter in modules/node/node.module
Implements hook_form_FORMID_alter().
node_form_block_custom_block_delete_alter in modules/node/node.module
Implements hook_form_FORMID_alter().
node_form_search_form_alter in modules/node/node.module
Implements hook_form_FORM_ID_alter().
openid_form_user_login_alter in modules/openid/openid.module
Implements hook_form_FORM_ID_alter().
openid_form_user_login_block_alter in modules/openid/openid.module
Implements hook_form_FORM_ID_alter().
openid_form_user_register_form_alter in modules/openid/openid.module
Implements hook_form_FORM_ID_alter().
overlay_form_user_profile_form_alter in modules/overlay/overlay.module
Implements hook_form_FORM_ID_alter().
path_form_node_form_alter in modules/path/path.module
Implements hook_form_BASE_FORM_ID_alter() for node_form().
path_form_taxonomy_form_term_alter in modules/path/path.module
Implements hook_form_FORM_ID_alter() for taxonomy_form_term().
session_test_form_user_login_alter in modules/simpletest/tests/session_test.module
Implements hook_form_FORM_ID_alter().
standard_form_install_configure_form_alter in profiles/standard/standard.profile
Implements hook_form_FORM_ID_alter() for install_configure_form().
syslog_form_system_logging_settings_alter in modules/syslog/syslog.module
Implements hook_form_FORM_ID_alter().
system_form_form_test_alter_form_alter in modules/simpletest/tests/form_test.module
Implements hook_form_FORM_ID_alter() on behalf of system.module.
system_form_user_profile_form_alter in modules/system/system.module
Implements hook_form_FORM_ID_alter().
system_form_user_register_form_alter in modules/system/system.module
Implements hook_form_FORM_ID_alter().
translation_form_node_form_alter in modules/translation/translation.module
Implements hook_form_BASE_FORM_ID_alter() for node_form().
translation_form_node_type_form_alter in modules/translation/translation.module
Implements hook_form_FORM_ID_alter() for node_type_form().
update_form_system_modules_alter in modules/update/update.module
Implements hook_form_FORM_ID_alter() for system_modules().
user_form_field_ui_field_edit_form_alter in modules/user/user.module
Implements hook_form_FORM_ID_alter().
user_form_test_form_user_profile_form_alter in modules/user/tests/user_form_test.module
Implements hook_form_FORM_ID_alter().