# Existing Dash app, need to add Dash Bootstrap Components

**URL:** <https://community.plotly.com/t/existing-dash-app-need-to-add-dash-bootstrap-components/43817>\
**Category:** Dash Python\
**Created:** [August 15, 2020, 2:28pm UTC](https://community.plotly.com/t/existing-dash-app-need-to-add-dash-bootstrap-components/43817 "2020-08-15T14:28:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aks02aks](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@aks02aks](https://community.plotly.com/u/aks02aks)\
**Post date:** [August 15, 2020, 2:28pm UTC](https://community.plotly.com/t/existing-dash-app-need-to-add-dash-bootstrap-components/43817/1 "2020-08-15T14:28:02Z")

</div>

I started using DASH few months back and working on an application. I found DASH very easy to learn and implement. But now I am stuck, when i learnt about Dash Bootstrap components.

Note: I am totally new to CSS, Bootstrap etc. and using default style as (external\_stylesheets = [‘[https://codepen.io/chriddyp/pen/bWLwgP.css](https://codepen.io/chriddyp/pen/bWLwgP.css)’]).

I use a file app.py, imported in all of my multi-page application, with above stylesheet.  
As I am trying to use bootstrap theme, my complete layout has become small, and look of components (TABS, Links, Buttons, Font of texts) has completely changed and not looking pretty.

I am unable to switch to Dash Bootstrap because of this reason. Kindly help

1. How can I use benefits of both stylesheets.

2. How to decide if bootstrap be applicable to only one page, out of multi-page application.