page adjusts for stamp

src/main/resources/messages_en_GB.properties

@@ -11,6 +11,7 @@ imgPrompt=Select Image(s)
 genericSubmit=Submit
 processTimeWarning=Warning: This process can take up to a minute depending on file-size
 pageOrderPrompt=Custom Page Order (Enter a comma-separated list of page numbers or Functions like 2n+1) :
+pageSelectionPrompt=Custom Page Selection (Enter a comma-separated list of page numbers 1,5,6 or Functions like 2n+1) :
 goToPage=Go
 true=True
 false=False

src/main/resources/templates/misc/stamp.html

@@ -22,6 +22,12 @@
 							th:action="@{api/v1/misc/add-stamp}">
 							<div
 								th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='application/pdf')}"></div>
+							<br>
+							
+							<div class="mb-3">
+                                <label for="pageOrder" th:text="#{pageSelectionPrompt}"></label> 
+                                <input type="text" class="form-control" id="pageOrder" name="pageNumbers" value="1" placeholder="(e.g. 1,3,2 or 4-8,2,10-12 or 2n-1)" required>
+                            </div>
                             
 							<div class="mb-3">
 								 <label for="customMargin" class="form-label" th:text="#{AddStampRequest.customMargin}">Custom Margin</label>