## RevisionLogCollection class

Represents all revision logs.

## Properties

| Name | Type | Description |
| --- | --- | --- |
| [DaysPreservingHistory](#dayspreservinghistory) | Number | Gets and sets the number of days the spreadsheet application will keep the change history for this workbook. |
| [Count](#count) | Number |  |
| [Item (int)](#itemint) | RevisionLog | Gets RevisionLog by index. |

## Methods

| Name | Description |
| --- | --- |
| [highlightChanges](#highlightchanges) | Highlights changes of shared workbook. |
| [clear](#clear) |  |
| [removeAt](#removeat) |  |
| [iterator](#iterator) |  |
| [get](#get) | Reserved for internal use. |
| [contains](#contains) | Reserved for internal use. |
| [add](#add) | Reserved for internal use. |
| [indexOf](#indexof) | Reserved for internal use. |

### RevisionLogCollection.DaysPreservingHistory property {#dayspreservinghistory}

Gets and sets the number of days the spreadsheet application will keep the change history for this workbook.

**Type:** Number

### RevisionLogCollection.Count property {#count}

**Type:** Number

### RevisionLogCollection.Item (int) property {#itemint}

Gets RevisionLog by index.

**Type:** RevisionLog

### highlightChanges(options) {#highlightchanges}

Highlights changes of shared workbook.

| Parameter | Type | Description |
| --- | --- | --- |
| options | HighlightChangesOptions | Set the options for filtering which changes should be tracked. |

### clear() {#clear}

### removeAt(index) {#removeat}

### iterator() {#iterator}

### get(index) {#get}

Reserved for internal use.

### contains(value) {#contains}

Reserved for internal use.

### add(value) {#add}

Reserved for internal use.

### indexOf(value) {#indexof}

Reserved for internal use.