Introduction to Z-Index and Layering in Bubble.io   In web design, the z-index property determines the stacking order of elements on the page. It is crucial for managing how elements overlap each other. When designing user interfaces in Bubble.io, controlling the z-index properly ensures that elements like pop-ups, drop-downs, and other UI components display correctly.   Understanding Z-Index in Bubble.io   In Bubble.io, every element has a default stacking position controlled by the z-index property. Higher values for z-index place elements in front of those with lower values. By default, all elements have a z-index of 0, but you can easily change this.   Setting Z-Index in Bubble.io  

• **Step 1:** Select the Element

Click on the element you wish to modify in the Bubble editor to make it active.

• **Step 2:** Access Element Properties

Once the element is selected, its properties will appear on the right-hand side of the editor.

• **Step 3:** Find the Z-Index Field

Scroll down in the properties panel until you find the 'Conditional' tab. Click on it, and look for the field named 'z-index'.

• **Step 4:** Adjust Z-Index

Enter the desired z-index value. Remember, higher numbers bring elements to the front.   Layering Strategies  

• **Use Group Elements:**

To control the z-index of multiple elements collectively, consider placing them inside a group. This makes it easier to manage their stacking order as a single unit.

• **Conditional Z-Index:**

Bubble.io allows you to change an element's z-index conditionally based on user interactions or other triggers. Use the 'Conditional' tab in the properties panel to set up these rules.

• **Testing Overlaps:**

Before finalizing your design, test how elements overlap by previewing your pages. Adjust z-index values as necessary to ensure that the UI behaves as expected.   Common Use Cases  

• **Pop-Ups and Modals:**

Ensure these elements have higher z-index values to appear above other content.

• **Fixed Headers and Footers:**

Set a higher z-index so they stay on top while scrolling.

• **Drop-Down Menus:**

Adjust z-index to ensure they overlay correctly, especially when near other interactive elements.   Conclusion   Managing the z-index and layering in Bubble.io is straightforward but requires careful planning. By setting appropriate z-index values and using grouping and conditional logic, you can create a visually appealing and functional user interface. Always test your design thoroughly to ensure that all elements display correctly in the intended stacking order.