An edit form consists of field-labels and corresponding edit-widgets, arranged in rows and columns. The field-labels come from the Labels column of the Schema Fields table (Schema subtab). The edit-widget for a field depends on its data type and, in some cases, on the additional Field Value information.

As the screen-shot annotations indicate, the yellow box contains a field-name (e.g. actTime), not a field-label (
Actual Time). On the edit form, the field-label and the corresponding edit-widget will appear, side by side, at this position. You can also expand a yellow box to make it span two or more columns.
You can organize the fields into multiple "tables", each of which defines a separate tabbed page in the edit form. One of the tables can define a header section, which always appears on the edit form, no matter which tabbed page is currently visible.

The Fields list-box offers all fields that do not currently appear in the edit form. Click to select a field in this list-box. Then, click at the empty location on the canvas where you want to place the field.

Click the Add Table button above the
Fields list-box. Fill in the Table Title field in the dialog box that appears, then click
OK . This title will appear on the page's tab in the edit form.
An edit form can have at most one header table. If another table is currently selected as the header table, it is automatically deselected. Its fields always appear at the top of the edit form, even if it is not the topmost table on the Layout tab.
You can also redefine an existing page to be a header table: right-click the gray box and select Properties. All fields in the header table will appear at the top of the database's edit form, above every tabbed page.
Right-click on the gray box, select Properties , and change the entry in the Table Title box.
Right-click the yellow box (field) or gray box (page), and select Delete from the context menu. Deleting a page doesn't delete the fields currently on the page -- it just deletes the gray box, effectively merging the fields into the page above.
Note: You cannot delete the first gray box; an edit form must have at least one page.