Running Google Apps Script Functions on Google Sheets Mobile App with a Dropdown Menu
You can execute custom functions directly from your Google Sheet using the onEdit trigger, even on the mobile app! Follow these steps to set it up, including adding a dropdown menu for function names:
1. Set Up Your Google Sheet
    - Open your Google Sheet and name the sheet where you want to run the functions (e.g., "Sheet1").
    - Go to Extensions > Apps Script on a desktop, paste the following code, and save it:
  
Full Script to Review:
function onEdit(e) {
  var sheetName = 'Sheet1'; // Set the sheet name here
  var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(sheetName);
  if (e.range.getA1Notation() == 'C3' && sheet) {
    if (/^\w+$/.test(e.value)) {        
      eval(e.value)();
      e.range.clear();
    }
  }
}
// Example functions
function clearItems() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Sheet1");
  sheet.getRange("A5:A100").clearContent();
}
function clearAll() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Sheet1");
  sheet.getRange("A5:E100").clearContent();
}
function exportPdf() {
  // Function now empty, can be customized for PDF export logic if needed
}
  
  2. Create a Dropdown Menu in Cell C3
    - On your sheet (e.g., "Sheet1"), select cell C3.
    - On the mobile app, tap the menu (three dots) in the top-right corner, then select Data validation (as shown in the image).
    - Set the criteria to "List of items" and enter the function names: clearItems, clearAll, exportPdf (separate each with a comma).
    - Save the validation to create a dropdown menu in C3. You can now tap C3 to access the dropdown.
  
3. Using the Mobile App
    - Open the Google Sheets app on your mobile device and load the same sheet.
    - Tap cell C3, select a function name from the dropdown (e.g., clearItems, clearAll, or exportPdf), and press "Done" or the return key.
    - The selected function will execute automatically:
    - clearItems clears content from A5:A100.
    - clearAll clears content from A5:E100.
    - exportPdf is currently empty but can be customized for PDF export logic.
    - The cell will clear after execution.
  
4. Notes
    - Ensure the sheet name in the script matches your active sheet.
    
    - The dropdown can now be set up directly on the mobile app using the Data validation option.
  
 
 
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