Layout base settings
Copy the below code and paste into the relevant row of modx_contentblocks_layout settings field.
Be sure to still add in the columns, and their references to Bootstrap Columns.
[{"reference":"bs_one","title":"Bootstrap Column 1","fieldtype":"textfield","default_value":"","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"","field_is_exposed":"modal"},{"reference":"data_id","title":"Data-UID Attribute","fieldtype":"textfield","default_value":"","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"","field_is_exposed":"modal"},{"reference":"full_width","title":"Show full width?","fieldtype":"select","default_value":"0","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"0==No\n1==Yes","field_is_exposed":"modal"},{"reference":"show_gutter","title":"Show Gutters?","fieldtype":"select","default_value":"1","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"0==No\n1==Yes","field_is_exposed":"modal"},{"reference":"vertical_align","title":"Vertical Align?","fieldtype":"select","default_value":"1","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"0==No\n1==Yes","field_is_exposed":"modal"},{"reference":"bg_color","title":"Background Colour","fieldtype":"select","default_value":"white_bg","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"white_bg==White\nblue_dk_bg==Dark Blue\nblue_lt_bg==Light Blue\ngreen_bg==Green\norange_bg==Orange\nred_bg==Red\nyellow_bg==Yellow\ngrey_lt_bg==Light Grey\ngrey_md_bg==Med Grey\ngrey_dk_bg==Dark Grey\ngrey_xdk_bg==Extra Dark Grey","field_is_exposed":"modal"},{"reference":"p_top","title":"Padding Top","fieldtype":"select","default_value":"pt45","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"pt0==0px \npt15==15px \npt30==30px \npt45==45px\npt60==60px\npt75==75px \npt90==90px \npt105==105px\npt120==120px","field_is_exposed":"modal"},{"reference":"p_bottom","title":"Padding Bottom","fieldtype":"select","default_value":"pb45","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"pb0==0px \npb15==15px \npb30==30px \npb45==45px\npb60==60px\npb75==75px \npb90==90px \npb105==105px\npb120==120px","field_is_exposed":"modal"},{"reference":"m_top","title":"Margin Top","fieldtype":"select","default_value":"mt0","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"mt0==0px \nmt15==15px \nmt30==30px \nmt45==45px\nmt60==60px\nmt75==75px \nmt90==90px \nmt105==105px\nmt120==120px","field_is_exposed":"modal"},{"reference":"m_bottom","title":"Margin Bottom","fieldtype":"select","default_value":"mb60","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"mb0==0px \nmb15==15px \nmb30==30px \nmb45==45px\nmb60==60px\nmb75==75px \nmb90==90px \nmb105==105px\nmb120==120px","field_is_exposed":"modal"},{"reference":"neg_margin","title":"Negative Margin","fieldtype":"select","default_value":"","image_source":"","image_directory":"","image_file_types":"","image_thumbnail_size":"","fieldoptions":"==0px \nnm15==15px \nnm30==30px \nnm45==45px\nnm60==60px\nnm75==75px \nnm90==90px ","field_is_exposed":"modal"}]