Change Proportions Of Columns In "Multicolumn" Section

Topic summary

A user is seeking help to modify a 3-column multicolumn section in their Shopify store design. They want to change the default equal column proportions (33:33:33) to an asymmetric layout (50:25:25), where the first column takes up half the width and the remaining two columns each occupy a quarter. The request includes a screenshot showing the desired layout with red blocks illustrating the target proportions. This appears to be a CSS customization question for achieving non-uniform column widths in a standard Shopify section.

Summarized with AI on November 12. AI used: claude-sonnet-4-5-20250929.

Hello,

How can I change the proportions of a 3 column “multicolumn” section to 50:25:25 (as the red blocks) instead of 33:33:33?

Please check my url: https://189ee3-2.myshopify.com/

Thank you,