diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61030ed5..4a1988be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,17 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+
+- Config: `tools.float_win_config` for all floating Windows
+  created by this plugin.
+  Moved `border`, `max_width`, `max_height`, `auto_focus`
+  from `hover_actions` to `float_win_config`.
+  The `hover_actions` window options are still applied
+  if they exist, so as not to break compatibility.
+
 ## [3.12.2] - 2024-01-07
 
 ### Fixed
diff --git a/lua/rustaceanvim/commands/explain_error.lua b/lua/rustaceanvim/commands/explain_error.lua
index eed513be..c4aff7da 100644
--- a/lua/rustaceanvim/commands/explain_error.lua
+++ b/lua/rustaceanvim/commands/explain_error.lua
@@ -1,3 +1,4 @@
+local config = require('rustaceanvim.config.internal')
 local M = {}
 
 local compat = require('rustaceanvim.compat')
@@ -52,12 +53,20 @@ function M.explain_error()
     local output = sc.stdout:gsub('```', '```rust', 1)
     local markdown_lines = vim.lsp.util.convert_input_to_markdown_lines(output, {})
     vim.schedule(function()
-      vim.lsp.util.open_floating_preview(markdown_lines, 'markdown', {
-        focus = false,
-        focusable = true,
-        focus_id = 'rustc-explain-error',
-        close_events = { 'CursorMoved', 'BufHidden', 'InsertCharPre' },
-      })
+      local _, winnr = vim.lsp.util.open_floating_preview(
+        markdown_lines,
+        'markdown',
+        vim.tbl_extend('keep', config.tools.float_win_config, {
+          focus = false,
+          focusable = true,
+          focus_id = 'rustc-explain-error',
+          close_events = { 'CursorMoved', 'BufHidden', 'InsertCharPre' },
+        })
+      )
+
+      if config.tools.float_win_config.auto_focus then
+        vim.api.nvim_set_current_win(winnr)
+      end
     end)
   end
 
diff --git a/lua/rustaceanvim/config/check.lua b/lua/rustaceanvim/config/check.lua
index 55946e31..1a9290aa 100644
--- a/lua/rustaceanvim/config/check.lua
+++ b/lua/rustaceanvim/config/check.lua
@@ -50,15 +50,21 @@ function M.validate(cfg)
   end
   local hover_actions = tools.hover_actions
   ok, err = validate('tools.hover_actions', {
-    auto_focus = { hover_actions.auto_focus, 'boolean' },
-    border = { hover_actions.border, 'table' },
-    max_height = { hover_actions.max_height, 'number', true },
-    max_width = { hover_actions.max_width, 'number', true },
     replace_builtin_hover = { hover_actions.replace_builtin_hover, 'boolean' },
   })
   if not ok then
     return false, err
   end
+  local float_win_config = tools.float_win_config
+  ok, err = validate('tools.float_win_config', {
+    border = { float_win_config.border, { 'table', 'string' } },
+    max_height = { float_win_config.max_height, 'number', true },
+    max_width = { float_win_config.max_width, 'number', true },
+    auto_focus = { float_win_config.auto_focus, 'boolean' },
+  })
+  if not ok then
+    return false, err
+  end
   ok, err = validate('tools', {
     executor = { tools.executor, { 'table', 'string' } },
     on_initialized = { tools.on_initialized, 'function', true },
diff --git a/lua/rustaceanvim/config/init.lua b/lua/rustaceanvim/config/init.lua
index 36007f63..6bd97725 100644
--- a/lua/rustaceanvim/config/init.lua
+++ b/lua/rustaceanvim/config/init.lua
@@ -59,15 +59,12 @@ vim.g.rustaceanvim = vim.g.rustaceanvim
 ---@field on_initialized? fun(health:RustAnalyzerInitializedStatus) Function that is invoked when the LSP server has finished initializing
 ---@field reload_workspace_from_cargo_toml? boolean Automatically call `RustReloadWorkspace` when writing to a Cargo.toml file
 ---@field hover_actions? RustaceanHoverActionsOpts Options for hover actions
+---@field float_win_config? table Options applied to floating windows. See |api-win_config|.
 ---@field create_graph? RustaceanCrateGraphConfig Options for showing the crate graph based on graphviz and the dot
 ---@field open_url? fun(url:string):nil If set, overrides how to open URLs
 
 ---@class RustaceanHoverActionsOpts
----@field replace_builtin_hover? boolean Whether to replace Neovim's built-in `vim.lsp.buf.hover`
----@field border? string[][] See `vim.api.nvim_open_win`
----@field max_width? integer | nil Maximum width of the hover window (`nil` means no max.)
----@field max_height? integer | nil Maximum height of the hover window (`nil` means no max.)
----@field auto_focus? boolean Whether to automatically focus the hover action window
+---@field replace_builtin_hover? boolean Whether to replace Neovim's built-in `vim.lsp.buf.hover` with hover actions. Default: `true`
 
 ---@alias lsp_server_health_status 'ok' | 'warning' | 'error'
 
diff --git a/lua/rustaceanvim/config/internal.lua b/lua/rustaceanvim/config/internal.lua
index a2089204..713881c9 100644
--- a/lua/rustaceanvim/config/internal.lua
+++ b/lua/rustaceanvim/config/internal.lua
@@ -42,13 +42,20 @@ local RustaceanDefaultConfig = {
     ---@class RustaceanHoverActionsConfig
     hover_actions = {
 
-      --- whether to replace Neovim's built-in `vim.lsp.buf.hover`
+      --- whether to replace Neovim's built-in `vim.lsp.buf.hover`.
+      --- default: true
       ---@type boolean
       replace_builtin_hover = true,
+    },
+
+    --- options same as lsp hover
+    ---@see vim.lsp.util.open_floating_preview
+    ---@type table Options applied to floating windows.
+    float_win_config = {
 
-      -- the border that is used for the hover window
+      -- the border that is used for floating windows
       ---@see vim.api.nvim_open_win()
-      ---@type string[][]
+      ---@type string[][] | string
       border = {
         { '╭', 'FloatBorder' },
         { '─', 'FloatBorder' },
@@ -58,17 +65,17 @@ local RustaceanDefaultConfig = {
         { '─', 'FloatBorder' },
         { '╰', 'FloatBorder' },
         { '│', 'FloatBorder' },
-      },
+      }, -- maybe: 'double', 'rounded', 'shadow', 'single',
 
-      --- maximal width of the hover window. Nil means no max.
+      --- maximal width of floating windows. Nil means no max.
       ---@type integer | nil
       max_width = nil,
 
-      --- maximal height of the hover window. Nil means no max.
+      --- maximal height of floating windows. Nil means no max.
       ---@type integer | nil
       max_height = nil,
 
-      --- whether the hover action window gets automatically focused
+      --- whether the window gets automatically focused
       --- default: false
       ---@type boolean
       auto_focus = false,
@@ -301,7 +308,6 @@ local RustaceanDefaultConfig = {
   },
   was_g_rustaceanvim_sourced = vim.g.rustaceanvim ~= nil,
 }
-
 local rustaceanvim = vim.g.rustaceanvim or {}
 local opts = type(rustaceanvim) == 'function' and rustaceanvim() or rustaceanvim
 if opts.tools and opts.tools.executor and type(opts.tools.executor) == 'string' then
diff --git a/lua/rustaceanvim/hover_actions.lua b/lua/rustaceanvim/hover_actions.lua
index db7a5488..25138eef 100644
--- a/lua/rustaceanvim/hover_actions.lua
+++ b/lua/rustaceanvim/hover_actions.lua
@@ -78,17 +78,20 @@ function M.handler(_, result, ctx)
     return
   end
 
+  -- NOTE: This is for backward compatibility
+  local win_opt = vim.tbl_deep_extend('force', config.tools.float_win_config, config.tools.hover_actions)
+
   local bufnr, winnr = lsp_util.open_floating_preview(
     markdown_lines,
     'markdown',
-    vim.tbl_extend('keep', config.tools.hover_actions, {
+    vim.tbl_extend('keep', win_opt, {
       focusable = true,
       focus_id = 'rust-analyzer-hover-actions',
       close_events = { 'CursorMoved', 'BufHidden', 'InsertCharPre' },
     })
   )
 
-  if config.tools.hover_actions.auto_focus then
+  if win_opt.auto_focus then
     vim.api.nvim_set_current_win(winnr)
   end