diff --git a/app/client/models/entities/ColumnRec.ts b/app/client/models/entities/ColumnRec.ts
index 3791baa6..8a4b8aa7 100644
--- a/app/client/models/entities/ColumnRec.ts
+++ b/app/client/models/entities/ColumnRec.ts
@@ -230,6 +230,23 @@ export function formatterForRec(
   return func(args);
 }
 
+export function labelsOrder(a: ColumnRec, b: ColumnRec): number {
+  const left  = a.label.peek().toLowerCase();
+  const right = b.label.peek().toLowerCase();
+
+  // Order is as follows:
+  // - First columns with normal labels starting with a letter.
+  // - Second all columns starting with '_' (treated as private)
+  // - Third all columns starting with '#' (treated as private)
+  // - Rest.
+  if (left[0] === '_' && right[0] !== '_') { return 1; }
+  if (left[0] !== '_' && right[0] === '_') { return -1; }
+  if (left[0] === '#' && right[0] !== '#') { return 1; }
+  if (left[0] !== '#' && right[0] === '#') { return -1; }
+  return left.localeCompare(right);
+}
+
+
 /**
  * A chat message. Either send by the user or by the AI.
  */
diff --git a/app/client/ui/CustomSectionConfig.ts b/app/client/ui/CustomSectionConfig.ts
index 52e0f78c..4ce4bf77 100644
--- a/app/client/ui/CustomSectionConfig.ts
+++ b/app/client/ui/CustomSectionConfig.ts
@@ -7,6 +7,7 @@ import {makeT} from 'app/client/lib/localization';
 import {localStorageBoolObs} from 'app/client/lib/localStorageObs';
 import {ColumnToMapImpl} from 'app/client/models/ColumnToMap';
 import {ColumnRec, ViewSectionRec} from 'app/client/models/DocModel';
+import {labelsOrder} from 'app/client/models/entities/ColumnRec';
 import {
   cssDeveloperLink,
   cssWidgetMetadata,
@@ -75,13 +76,12 @@ class ColumnPicker extends Disposable {
       void use(refreshTrigger);
 
       const columnsAsOptions: IOption<number|null>[] = use(canBeMapped)
+        .sort(labelsOrder)
         .map((col) => ({
           value: col.getRowId(),
           label: col.label.peek() || '',
           icon: 'FieldColumn',
         }));
-      // Order it by label.
-      columnsAsOptions.sort((a, b) => a.label.localeCompare(b.label));
 
       // For optional mappings, add 'Blank' option but only if the value is set.
       // This option will allow to clear the selection.
@@ -205,6 +205,7 @@ class ColumnListPicker extends Disposable {
             const wrongTypeCount = notMapped.get().length - typedColumns.get().length;
             return [
               ...typedColumns.get()
+              .sort(labelsOrder)
               .map((col) => menuItem(
                 () => this._addColumn(col),
                 col.label.peek(),
diff --git a/app/client/ui/PageWidgetPicker.ts b/app/client/ui/PageWidgetPicker.ts
index dbd7cf84..8c64b736 100644
--- a/app/client/ui/PageWidgetPicker.ts
+++ b/app/client/ui/PageWidgetPicker.ts
@@ -32,6 +32,7 @@ import {
 import Popper from 'popper.js';
 import {IOpenController, popupOpen, setPopupToCreateDom} from 'popweasel';
 import without = require('lodash/without');
+import {labelsOrder} from 'app/client/models/entities/ColumnRec';
 
 const t = makeT('PageWidgetPicker');
 
@@ -407,7 +408,7 @@ export class PageWidgetSelect extends Disposable {
             (use) => use(this._columns)
               .filter((col) => !col.isHiddenCol() && col.parentId() === use(this._value.table)),
             (cols) => cols ?
-              dom.forEach(cols, (col) =>
+              dom.forEach([...cols].sort(labelsOrder), (col) =>
                 cssEntry(cssIcon('FieldColumn'), cssFieldLabel(dom.text(col.label)),
                   dom.on('click', () => this._toggleColumnId(col.id())),
                   cssEntry.cls('-selected', (use) => use(this._value.columns).includes(col.id())),