The allowed file formats are .csv, .xls and .xlsx. The maximum file size is 10 MB. the training data has to have a minimum of two columns.
To upload a file you can click on the 
-button . If there is no data inside the classifier yet, it will be located in the middle of the page. If you already have data inside, the button will appear in the upper right corner. You then continue as follows:
1️⃣ Upload a file
In the middle of the page, you can choose and upload a file via Drag & Drop or by clicking the arrow on the file. You can also download and edit an example file under 
.
2️⃣ Choose a category and text
Next, you have to choose which column contains the text and which column contains the category:
3️⃣ Remove header from columns
Often, the first row in a table contains a header, which is also the case in the example shown above. By selecting the following option the headline won’t be imported as data:
After selecting this option, the top row should appear crossed out:
If the top row isn’t a header but a training example, this step can be skipped.
4️⃣ Confirm upload
By clicking on the 
-button, the training data will be uploaded and the import will be completed.