This article provides step-by-step instructions on editing, creating, and deleting an index and formula.

With the Index Calculator, it is possible to perform the following actions:

• Edit an Index - Formula from PIX4Dmapper Index Database
• Edit a user-defined Index - Formula
• Add a new Index - Formula
• Delete a user-defined Index

Edit an Index - Formula from PIX4Dmapper Index Database

1. On the Menu bar, click View > Index Calculator. 


2. On the Index Calculator sidebar, in section 3. Index Map, click Indices...

3. Select the Index to edit and click Duplicate. A new index with the name "IndexName_copy" is created.

4. (optional) Change the index name:

4.1. Select the Index by clicking the Index name.
4.2. Double-click the Index name.
4.3. Edit the name.

5. (optional) Change the formula expression. There are two ways of changing the formula expression:

1. By double-clicking on the formula:

1.1. Select the Index by clicking the Index name.
1.2. Double-click the formula.
1.3. Edit the expression.

2. By clicking on Edit:

2.1. Select the Index by clicking the Index name.
2.2. Click Edit.
2.3. Use the Formula Editor to change the formula. For information about the Formula Editor and how to use it: Menu View > Index Calculator > Sidebar > 3. Index Map > Index Map (Formula Editor).
2.4. Once the formula is completed, click OK.

 6. On the Index List pop-up click:

• OK: To close the Index List and display the last selected index from the Index List in section 3. Index Map.
• Cancel: To close the Index List and display the index selected before opening the Index List in section 3. Index Map.

Edit a user-defined Index - Formula

1. On the Menu bar, click View > Index Calculator. 

2. On the Index Calculator Sidebar, in section 3. Index Map, click Indices...


3. (optional) Change the index name:

3.1. Select the Index by clicking the Index name.
3.2. Double-click the index name.
3.3. Edit the name.

4. (optional) Change the formula. There are two ways of changing the formula expression:

1. By double-clicking on the formula:

1.1. Select the Index by clicking the index name.
1.2. Double-click the formula.
1.3. Edit the formula.

2. By clicking on Edit:

2.1. Select the Index by clicking the index name.
2.2. Click Edit.
2.3. Use the Formula Editor to change the formula. For information about the Formula Editor and how to use it: Menu View > Index Calculator > Sidebar > 3. Index Map > Index Map (Formula Editor).
2.4. Once the formula is complete, click OK. 

 5. On the Index List window click:

• OK: To close the Index List and display the last selected Index from the Index List in section 3.Index Map.
• Cancel: To close the Index List and display the index selected before opening the Index List in section 3. Index Map.

Add a new Index - Formula 

1. On the Menu bar, click View > Index Calculator. 


2. On the Index Calculator Sidebar, in section 3. Index Map, click Indices...


3. Click Add. The Formula Editor pop-up appears.

• If the Reflectance Map is generated:

• If the Reflectance Map is not generated:

4. Use the Formula Editor to edit the formula. If the Reflectance Map is generated, use the bands of the Reflectance Map Band Selection. If the Reflectance Map is not generated, compose the index by typing the formula. For information about the Formula Editor and how to use it: Menu View > Index Calculator > Sidebar > 3. Index Map > Index Map (Formula Editor).
5. Once the formula expression is completed, click OK.

6. By default, the new Index is created with the name "unnamed".
7. (optional) Change the new index name:

7.1. Select the Index by clicking the index name.
7.2. Double-click the index name.
7.3. Edit the name.

8. On the Index List window click:

• OK: To close the Index List and display the last selected index from the Index List in section 3. Index Map.
• Cancel: To close the Index List and display the index selected before opening the Index List in section 3. Index Map.

Delete a user-defined Index 

1. On the Menu bar, click View > Index Calculator. 


2. On the Index Calculator Sidebar, in section 3. Index Map, click Indices...


3. Select the Index to be deleted.
4. Click Remove.


5. On the Index List window click:

• OK: To close the Index List and display the last selected Index from the Index List in section 3. Index Map.
• Cancel: To close the Index List and display the index selected before opening the Index List in section 3. Index Map.