New: Informational text on Custom Formats modal

frontend/src/Settings/CustomFormats/CustomFormats/EditCustomFormatModalContent.js

@@ -151,6 +151,11 @@ class EditCustomFormatModalContent extends Component {
                   </Form>
 
                   <FieldSet legend={translate('Conditions')}>
+                    <Alert kind={kinds.INFO}>
+                      <div>
+                        {translate('CustomFormatsSettingsTriggerInfo')}
+                      </div>
+                    </Alert>
                     <div className={styles.customFormats}>
                       {
                         specifications.map((tag) => {

src/NzbDrone.Core/Localization/Core/en.json

@@ -278,6 +278,7 @@
   "CustomFormats": "Custom Formats",
   "CustomFormatsLoadError": "Unable to load Custom Formats",
   "CustomFormatsSettings": "Custom Formats Settings",
+  "CustomFormatsSettingsTriggerInfo": "A Custom Format will be applied to a release or file when it matches at least one of each of the different condition types chosen.",
   "CustomFormatsSettingsSummary": "Custom Formats and Settings",
   "CustomFormatsSpecificationFlag": "Flag",
   "CustomFormatsSpecificationLanguage": "Language",