sheetjs/docbits/56_wbprops.md

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#### Workbook File Properties
The various file formats use different internal names for file properties. The
workbook `Props` object normalizes the names:
| JS Name | Excel Description |
|:------------|:-------------------------------|
| Title | Summary tab "Title" |
| Subject | Summary tab "Subject" |
| Author | Summary tab "Author" |
| Manager | Summary tab "Manager" |
| Company | Summary tab "Company" |
| Category | Summary tab "Category" |
| Keywords | Summary tab "Keywords" |
| Comments | Summary tab "Comments" |
| LastAuthor | Statistics tab "Last saved by" |
| CreatedDate | Statistics tab "Created" |
For example, to set the workbook title property:
```js
if(!wb.Props) wb.Props = {};
wb.Props.Title = "Insert Title Here";
```
Custom properties are added in the workbook `Custprops` object:
```js
if(!wb.Custprops) wb.Custprops = {};
wb.Custprops["Custom Property"] = "Custom Value";
```
Writers will process the `Props` key of the options object:
```js
/* force the Author to be "SheetJS" */
XLSX.write(wb, {Props:{Author:"SheetJS"}});
```