diff --git a/resources/assets/js/components/ColumnEditor.vue b/resources/assets/js/components/ColumnEditor.vue
index 99bbe93..14335f2 100644
--- a/resources/assets/js/components/ColumnEditor.vue
+++ b/resources/assets/js/components/ColumnEditor.vue
@@ -170,10 +170,12 @@ export default {
     }
   },
   methods: {
+    /** Send a query to the server */
     query (data, sucfn, erfn) {
       query(this.route, data, sucfn, erfn)
     },
 
+    /** Add a column at the end */
     addCol () {
       if (this.newTable) {
         this.columns.push({
@@ -191,17 +193,25 @@ export default {
       }
     },
 
-    move (i, dir) {
-      let cur = this.columns[i]
-      let next = this.columns[i + dir]
-      this.$set(this.columns, i, next)
-      this.$set(this.columns, i + dir, cur)
+    /** Swap column in either direction (+1 or -1) */
+    move (pos1, dir) {
+      let pos2 = pos1 + dir
+      if (pos2 < 0 || pos2 >= this.columns.length) {
+        console.warn(`Attempted to move out of bounds (${pos1} -> ${pos2})`)
+        return;
+      }
+      let col1 = this.columns[pos1]
+      let col2 = this.columns[pos2]
+      this.$set(this.columns, pos1, col2)
+      this.$set(this.columns, pos2, col1)
     },
 
+    /** Indicate a column is dirty and needs saving */
     markColNeedSave(i) {
       this.$set(this.columns[i], '_dirty', true)
     },
 
+    /** User started dragging a column */
     beginDrag (i, evt) {
       const column = this.columns[i]
       column._dragging = true
@@ -241,6 +251,7 @@ export default {
       $(window).on('mouseup', dragEndListener)
     },
 
+    /** Compute classes for the column's delete button */
     delBtnClass(col) {
       return [
         'btn',
@@ -251,6 +262,7 @@ export default {
       ]
     },
 
+    /** Save a column */
     saveCol(n) {
       let col = this.columns[n]
       if (_.isUndefined(col)) return
@@ -267,6 +279,7 @@ export default {
       })
     },
 
+    /** Delete / undelete a column; New columns vanish. */
     toggleColDelete(n) {
       let col = this.columns[n]
       if (_.isUndefined(col)) return
diff --git a/resources/assets/js/components/RowsEditor.vue b/resources/assets/js/components/RowsEditor.vue
index 4da3783..247f75a 100644
--- a/resources/assets/js/components/RowsEditor.vue
+++ b/resources/assets/js/components/RowsEditor.vue
@@ -79,10 +79,12 @@ Rows are identified by row._id, columns by col.id
       }
     },
     methods: {
+      /** Send a query to the server */
       query (data, sucfn, erfn) {
         query(this.route, data, sucfn, erfn)
       },
 
+      /** Toggle row delete status, remove new rows (when using the editor widget for added rows) */
       toggleRowDelete (_id) {
         if (!_.isDefined(this.rows[_id])) return
 
@@ -103,6 +105,7 @@ Rows are identified by row._id, columns by col.id
         })
       },
 
+      /** Save a change */
       submitRowChange (row) {
         this.query({
           action: 'row.update',
@@ -116,6 +119,7 @@ Rows are identified by row._id, columns by col.id
         })
       },
 
+      /** Toggle editing state - edit or save */
       toggleRowEditing (_id) {
         if (this.rows[_id]._remove) return false // can't edit row marked for removal
         let editing = !this.rows[_id]._editing
@@ -127,6 +131,7 @@ Rows are identified by row._id, columns by col.id
         }
       },
 
+      /** Compute classes for a value cell */
       colClasses (col) {
         return [
           'border-top-0',
@@ -138,6 +143,7 @@ Rows are identified by row._id, columns by col.id
         ]
       },
 
+      /** Compute style for a row */
       rowStyle (row) {
         return {
           opacity: row._remove ? .8 : 1,
@@ -147,10 +153,12 @@ Rows are identified by row._id, columns by col.id
         }
       },
 
+      /** Test if a value cell is changed */
       isChanged (row, colId) {
         return row._changed && row._changed.indexOf(colId) > -1
       },
 
+      /** Revert a value cell */
       revertCell (row, colId) {
         this.submitRowChange(_.merge({}, row, {[colId]: row._orig[colId]}))
       }