You can change the default layout (vertical or horizontal) in the module’s settings popup or via the Odoo action context, allowing you to tailor the view to your preference. Here's some example action context:

• {'ux_props': { 'direction': 'vertical' }}
• {'ux_props': { 'direction': 'horizontal' }}
• {'ux_props': { 'split_list': 'auto', 'direction': 'vertical' }}

Absolutely. You can set "auto turn on split view" in the Odoo action context so that whenever you open a specified view, the module automatically splits the screen. Here's some example action context:

• {'ux_props': { 'split_list': 'auto' }}
• {'ux_props': { 'split_list': false }}
• {'ux_props': { 'split_list': 'auto', 'direction': 'vertical' }}

Yes. You can programmatically set or override the Odoo action context in your custom Python code to enable or configure the Split View (e.g., default orientation, auto-activation) for specific actions or modules. Here's a example:

def action_open_split_view_act_window(self):
    return {
        'name': 'Split View on Sale Order #6',
        'type': 'ir.actions.act_window',
        'res_model': 'sale.order',
        'view_mode': 'list,form',
        'context': {
            'split_res_id': 6,
            'ux_props': { 'direction': 'vertical' },
        },
    }

Absolutely. When performing a soft reload (or navigating between views), the module preserves your current Split View state. You won’t lose the open record or panel layout unless you explicitly turn off Split View or perform a full page reload. Here's two way to excec a soft reload:

• In Python: return {'type': 'ir.actions.client', 'tag': 'soft_reload'}
• In Javascript: env.services.action.doAction('soft_reload')

All native Odoo operations remain fully functional. You can still perform searches, create or delete records, and import/export data without losing the split view context.

↳ Toggle the mode through a dedicated button, verify that this button only appears when the user is viewing a list view.

↳ When enabled, when clicking on a record in the list view, verify that the system will open the record in a panel on the right side of the list view.

↳ When disabled, when clicking on a record in the list view, verify that the system will switch to the detail screen of the form view as the default Odoo behavior.

↳ When closing the right panel in split view mode, the left panel's state remains unchanged, and the right panel is hidden.

↳ Verify that the functionality does not work with editable inline list view.

↳ When hovering over the splitter, it should be highlighted, and when dragging the mouse left or right, the width of the corresponding panels should be adjusted accordingly.

↳ Verify that double-clicking the splitter will evenly distribute the size between the list view panel and the form view panel.

↳ Verify that the splitter functionality works correctly in RTL (right-to-left) mode.

↳ While a record is open in Split View mode, verify that the list view panel still allows for standard operations such as search, delete, duplicate, archive, import and export data.

↳ Verify that whenever a record is opened in the form view panel and it exists in the list view panel, the corresponding row on the list view must be highlighted in yellow.

↳ While a record is open in Split View mode, verify that the form view retains its standard layout and functionality. Ensure that it can perform typical actions such as creating new records, duplicating, archiving, and printing. Additionally, all relevant smart buttons should be displayed (if the form view had smart buttons before enabling Split View, they should still be present after enabling Split View).

↳ While a record is open in Split View mode, verify that when a wizard is opened within the form view panel, the task completes successfully without errors and behaves as expected before enabling Split View mode

↳ When a record is opened in Split View mode, make sure that the current view’s state is retained even if the user navigates away via any navigation function. Split View mode will only disappear when it is turned off in the corresponding view or when the page is reloaded.

↳ When a record is opened in Split View mode, perform a click on any menu item to switch to another application, verify that no errors occur and the behavior of Split View mode is not lost in any situation, at this time if you turn off the Split View mode, verify that when opening a record on any list view, the open behavior must be reverted to the Odoo default.

↳ When a record is opened in Split View mode and the form view contains a section of smart buttons, interact with these buttons. After navigating back to the Split View, verify that the view retains its previous state and that the currently open record remains highlighted.

↳ When a record is opened in Split View mode, click on an object within the form view to view its details (e.g., clicking on a partner on a sale order to view the partner's details, which opens the partner's form view and exits the split view). Upon returning to the Split View, verify that the view retains its previous state and that the currently open record remains highlighted.

↳ When deleting a record in the list view that is currently open in the form view, verify that the list view automatically moves the cursor to the first record in the list and updates the form view panel accordingly.

↳ When deleting a record in the form view that is currently highlighted in the list view, verify that the list view automatically moves the cursor to the first record in the list and updates the form view panel accordingly.

↳ In the form view panel within split view mode, any operation that results in a data change for the record in the system should cause the corresponding row in the list view to be updated accordingly.

↳ In the form view panel within split view mode, when creating a new record or duplicating a record, the corresponding record should become the highlighted record in the list view.