Osclass Filters are helpful functions to pass data through which allow developers to modify the default behavior of a specific function, below are the filters you could use:
OSCLASS ADMIN FILTERS
login_admin_title login_admin_url login_admin_image page_templates admin_favicons admin_item_title admin_page_title admin_item_description admin_page_description
OSCLASS MODERN THEME FILTERS
admin_favicons admin_item_title admin_page_title admin_item_description admin_page_description
OSCLASS CORE FILTERS
actions_manage_alerts more_actions_manage_rules rules_processing_row comments_processing_row actions_manage_items items_processing_row items_processing_reported_row resource_path media_processing_row pages_processing_row more_actions_manage_users actions_manage_users users_processing_row email_legend_words watermark_font_path watermark_text_value watermark_font_size theme_url style_url contact_params pre_show_item pre_show_items item_title correct_login_url_redirect email_description save_latest_searches_pattern moderator_access theme mo_core_path mo_theme_path mo_plugin_path mo_theme_messages_path mo_core_messages_path email_alert_validation_title email_alert_validation_description email_alert_validation_title_after email_alert_validation_description_after alert_email_hourly_title alert_email_hourly_description alert_email_hourly_title_after alert_email_hourly_description_after alert_email_daily_title alert_email_daily_description alert_email_daily_title_after alert_email_daily_description_after alert_email_weekly_title alert_email_weekly_description alert_email_weekly_title_after alert_email_weekly_description_after alert_email_instant_title alert_email_instant_description alert_email_instant_title_after alert_email_instant_description_after email_comment_validated_title email_comment_validated_title_after email_comment_validated_description email_comment_validated_description_after email_new_item_non_register_user_title email_new_item_non_register_user_title_after email_new_item_non_register_user_description email_new_item_non_register_user_description_after email_user_forgot_pass_word_title email_user_forgot_pass_word_title_after email_user_forgot_password_description email_user_forgot_password_description_after email_user_registration_title email_user_registration_title_after email_user_registration_description email_user_registration_description_after email_title email_new_email_title email_new_email_title_after email_new_email_description email_new_email_description_after email_user_validation_title email_user_validation_title_after email_send_friend_title email_send_friend_title_after email_send_friend_description email_send_friend_description_after email_item_inquiry_title email_item_inquiry_title_after email_item_inquiry_description email_item_inquiry_description_after email_new_comment_admin_title email_new_comment_admin_title_after email_item_validation_title email_item_validation_title_after email_item_validation_description email_item_validation_description_after email_admin_new_item_title email_admin_new_item_title_after email_admin_new_item_description email_admin_new_item_description_after email_item_validation_non_register_user_title email_item_validation_non_register_user_title_after email_item_validation_non_register_user_description email_item_validation_non_register_user_description_after email_admin_user_registration_title email_admin_user_registration_title_after email_admin_user_regsitration_description email_admin_user_regsitration_description_after email_item_inquiry_title email_item_inquiry_title_after email_item_inquiry_description email_item_inquiry_description_after email_new_comment_user_title email_new_comment_user_title_after email_new_comment_user_description email_new_comment_user_description_after email_new_admin_title email_new_admin_title_after email_new_admin_description email_new_admin_description_after email_warn_expiration_title email_warn_expiration_title_after email_warn_expiration_description email_warn_expiration_description_after email_after_auto_upgrade_title email_after_auto_upgrade_title_after email_after_auto_upgrade_description email_after_auto_upgrade_description_after osc_item_edit_meta_textarea_value_filter meta_title_filter meta_description_filter meta_description_filter current_admin_menu_ base_url admin_base_url item_price flash_message_text gettext ngettext user_menu_filter item_add_prepare_data pre_item_add_error item_edit_prepare_data pre_item_edit_error item_prepare_data upload_image_extension upload_image_mime slug sql_search_conditions sql_search_fields sql_search_item_conditions user_add_flash_error init_send_mail mail_from mail_from_name pre_send_mail shutdown_functions