> For the complete documentation index, see [llms.txt](https://danfo.jsdata.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://danfo.jsdata.org/api-reference/configuration-options.md).
# Configuration Options
On DataFrame/Series creation, a config object can be passed along to configure some internal properties of the created object. The following list shows what options are available and what they do.
| Parameter | Description |
| ------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| tableDisplayConfig | **Object**, General table display options. Because we use the table package under the hood to display a table in the console, all [table display configurations](https://www.npmjs.com/package/table) are supported. |
| tableMaxRow | **Number**, the total number of rows to display in the console when the **print** function is called. Defaults to 10 |
| dtypeTestLim | **Number**, the total number of values to test when inferring data type. Defaults to 20 |
| lowMemoryMode | Boolean, whether to use minimal memory space or not. Defaults to false.
Note: There's a slight decrease in speed when low memory mode is set to true.
|
> See an example of creating DataFrame [in low memory mode](/api-reference/dataframe/creating-a-dataframe.md#creating-a-dataframe-and-specifying-memory-mode)
## Examples of setting configs
### Add a DataFrame header
```javascript
const data = {
"Name": ["Apples", "Mango", "Banana", "Pear"],
"Count": [21, 5, 30, 10],
"Price": [200, 300, 40, 250]
};
const df = new DataFrame(data, {
config: {
tableDisplayConfig: {
header: {
alignment: 'center',
content: 'THE HEADER\nThis is the table about something',
},
},
}
});
df.print()
```
```javascript
╔════════════════════════════════════════════════════════════════════════╗
║ THE HEADER ║
║ This is the table about something ║
╟────────────┬───────────────────┬───────────────────┬───────────────────╢
║ │ Name │ Count │ Price ║
╟────────────┼───────────────────┼───────────────────┼───────────────────╢
║ 0 │ Apples │ 21 │ 200 ║
╟────────────┼───────────────────┼───────────────────┼───────────────────╢
║ 1 │ Mango │ 5 │ 300 ║
╟────────────┼───────────────────┼───────────────────┼───────────────────╢
║ 2 │ Banana │ 30 │ 40 ║
╟────────────┼───────────────────┼───────────────────┼───────────────────╢
║ 3 │ Pear │ 10 │ 250 ║
╚════════════╧═══════════════════╧═══════════════════╧═══════════════════╝
```
### Configure column size and display format of DataFrame
```javascript
const data = {
"Name": ["Apples", "Mango", "Banana", "Pear"],
"Count": [21, 5, 30, 10],
"Price": [200, 300, 40, 250]
};
const df = new DataFrame(data, {
config: {
tableDisplayConfig: {
header: {
alignment: 'center',
content: 'THE HEADER\nThis is the table about something',
},
columns: [
{ alignment: 'left' },
{ alignment: 'center', width: 20 },
{ alignment: 'right' },
{ alignment: 'justify' }
],
},
}
});
df.print()
```
```javascript
╔══════════════════════════════════════════╗
║ THE HEADER ║
║ This is the table about something ║
╟───┬──────────────────────┬───────┬───────╢
║ │ Name │ Count │ Price ║
╟───┼──────────────────────┼───────┼───────╢
║ 0 │ Apples │ 21 │ 200 ║
╟───┼──────────────────────┼───────┼───────╢
║ 1 │ Mango │ 5 │ 300 ║
╟───┼──────────────────────┼───────┼───────╢
║ 2 │ Banana │ 30 │ 40 ║
╟───┼──────────────────────┼───────┼───────╢
║ 3 │ Pear │ 10 │ 250 ║
╚═══╧══════════════════════╧═══════╧═══════╝
```
### Configure the number of rows displayed when **print** is called
```javascript
const data = {
"Name": ["Apples", "Mango", "Banana", "Pear"],
"Count": [21, 5, 30, 10],
"Price": [200, 300, 40, 250],
};
const df = new DataFrame(data, {
config: {
tableMaxColInConsole: 6,
tableMaxRow: 1
}
});
df.print()
```
```
╔════════════╤═══════════════════╤═══════════════════╤═══════════════════╗
║ │ Name │ Count │ Price ║
╟────────────┼───────────────────┼───────────────────┼───────────────────╢
║ 0 │ Apples │ 21 │ 200 ║
╚════════════╧═══════════════════╧═══════════════════╧═══════════════════╝
```
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