
In this blog post, I’ll show you how to quickly generate many images for an online session, video course, or conference.
I’ll use [RenderForm](/) to create a template, load data from a spreadsheet, and generate the images.

## Create a template

I used a predefined template from the **Templates** tab and adjusted it to my needs. RenderForm offers a wide selection of templates across many categories.
You can also create your own template from scratch using the easy-to-use template editor.

In this example, I’ll modify text in two places and change the image (you can see component names in the left panel):

- `author_photo` – author image on the right side
- `author_name` – author name under the image
- `title` – session title

![template in canvas editor for marketing automation](/blog/template-in-canvas-editor.png)

## Create a spreadsheet

I created my spreadsheet in **Numbers** (macOS default), but you can use Excel or any other spreadsheet app.

In the first row, I entered the component names along with the property I wanted to modify, separated by a dot.

A **property** is the variable of a component that you want to change—for example, text, image source URL, background color, or opacity.
See the docs for more info on [components and their properties](/docs/general/template-properties/).

Here’s what my spreadsheet includes:

- `author_photo.src` – change the image source of the `author_photo` component
- `author_name.text` – change the text of the `author_name` component
- `title.text` – change the text of the `title` component

> Optionally, you can add the `_fileName` property to define the name of the generated image.
> Keep in mind that the file name must be unique and **should not include a file extension**, as it will be added automatically.
> If you don’t specify this property, a name will be generated automatically.

![data in spreadsheet](/blog/data-in-spreadsheet.png)

## Generate images

Now go to the **Extensions** tab in RenderForm and open the **Spreadsheet** extension.
Click **Import from file** to upload your spreadsheet, and select the template you want to use on the left side.

![RenderForm extensions](/blog/bannerly-extensions.png)

If all the properties in your file match the components in your selected template, you're ready to generate.

Click the **Generate** button at the top of the list. Make sure not to close the window until the generation process is complete.

![list with generated images in spreadsheet extension](/blog/list-with-generated-images.png)

Once the generation finishes, you’ll be able to download all the images using the **Download** button.

![generated images from template for marketing automation](/blog/generated-images.png)

With the **Spreadsheet** extension, you can quickly generate many images using one template and custom content.
Combined with RenderForm's editor, it’s a powerful way to create blog post covers, marketing visuals, or brochures that match your brand or platform style.

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How to create many images from a spreadsheet?