diff --git a/app/controllers/measurements_controller.rb b/app/controllers/measurements_controller.rb
index 22ce980..307aac8 100644
--- a/app/controllers/measurements_controller.rb
+++ b/app/controllers/measurements_controller.rb
@@ -1,14 +1,12 @@
 class MeasurementsController < ApplicationController
-  before_action :find_quantity, only: [:new]
+  before_action :find_quantity, only: [:new, :discard]
+  before_action :find_prev_quantities, only: [:new, :discard]
 
   def index
     @quantities = current_user.quantities.ordered
   end
 
   def new
-    prev_quantity_ids = params[:readouts]&.map { |r| r[:quantity_id] } || []
-    @prev_quantities = current_user.quantities.find(prev_quantity_ids)
-
     quantities =
       case params[:scope]
       when 'children'
@@ -21,12 +19,18 @@ class MeasurementsController < ApplicationController
     quantities -= @prev_quantities
     @readouts = current_user.readouts.build(quantities.map { |q| {quantity: q} })
 
-    all_quantities = @prev_quantities + quantities
-    @closest_ancestor = current_user.quantities
-      .common_ancestors(all_quantities.map(&:parent_id)).first
-    all_quantities << @closest_ancestor if @closest_ancestor
-
     @units = current_user.units.ordered
+
+    all_quantities = @prev_quantities + quantities
+    @common_ancestor = current_user.quantities
+      .common_ancestors(all_quantities.map(&:parent_id)).first
+  end
+
+  def discard
+    @prev_quantities -= [@quantity]
+
+    @common_ancestor = current_user.quantities
+      .common_ancestors(@prev_quantities.map(&:parent_id)).first
   end
 
   def create
@@ -40,4 +44,9 @@ class MeasurementsController < ApplicationController
   def find_quantity
     @quantity = current_user.quantities.find_by!(id: params[:id])
   end
+
+  def find_prev_quantities
+    prev_quantity_ids = params[:readouts]&.map { |r| r[:quantity_id] } || []
+    @prev_quantities = current_user.quantities.find(prev_quantity_ids)
+  end
 end
diff --git a/app/models/quantity.rb b/app/models/quantity.rb
index 992b168..1af0e01 100644
--- a/app/models/quantity.rb
+++ b/app/models/quantity.rb
@@ -144,7 +144,7 @@ class Quantity < ApplicationRecord
     user.quantities.ordered(root: id, include_root: false).to_a
   end
 
-  # Return: record with ID `of` with its ancestors, sorted by `depth`
+  # Return: record with ID `of` with its ancestors, sorted by :depth
   scope :with_ancestors, ->(of) {
     selected = Arel::Table.new('selected')
 
@@ -163,4 +163,8 @@ class Quantity < ApplicationRecord
   def ancestor_of?(progeny)
     user.quantities.with_ancestors(progeny.id).exists?(id)
   end
+
+  def relative_pathname(ancestor)
+    pathname.delete_prefix(ancestor&.pathname || '')
+  end
 end
diff --git a/app/views/measurements/_form.html.erb b/app/views/measurements/_form.html.erb
index 3852eab..8012d79 100644
--- a/app/views/measurements/_form.html.erb
+++ b/app/views/measurements/_form.html.erb
@@ -1,14 +1,12 @@
 <% @readouts.each do |readout| %>
   <%= tabular_fields_for 'readouts[]', readout do |form| %>
-    <% row = dom_id(form.object.quantity, :new, :readout) %>
-    <%- tag.tr id: row, onkeydown: 'processKey(event)' do %>
+    <%- tag.tr id: dom_id(readout.quantity, :new, :readout),
+               onkeydown: 'processKey(event)' do %>
+      <%= tag.td id: dom_id(readout.quantity, nil, :pathname) do %>
+        <%= readout.quantity.relative_pathname(@common_ancestor) %>
+      <%end%>
       <td>
-        <%= form.object.quantity.pathname.delete_prefix(@closest_ancestor.pathname) %>
-        <%= form.hidden_field :quantity_id %>
-      </td>
-      <td>
-        <%= form.number_field :value, required: true, autofocus: true,
-          size: 10 %>
+        <%= form.number_field :value, required: true, autofocus: true, size: 10 %>
       </td>
       <td>
         <%= form.select :unit_id, options_from_collection_for_select(
@@ -17,9 +15,10 @@
       </td>
 
       <td class="actions">
-        <%= image_link_to t(:delete), 'delete-outline', quantities_path,
-          class: 'dangerous',
-          onclick: render_turbo_stream('form_destroy_row', {row: row}) %>
+        <%= image_button_tag t(:delete), 'delete-outline', class: 'dangerous',
+          formaction: discard_new_measurement_path(readout.quantity),
+          formmethod: :get, formnovalidate: true, data: {turbo_stream: true} %>
+        <%= form.hidden_field :quantity_id %>
       </td>
     <% end %>
   <% end %>
diff --git a/app/views/measurements/_form_destroy_row.html.erb b/app/views/measurements/_form_destroy_row.html.erb
deleted file mode 100644
index f567f95..0000000
--- a/app/views/measurements/_form_destroy_row.html.erb
+++ /dev/null
@@ -1,2 +0,0 @@
-<%= turbo_stream.remove row %>
-<%= turbo_stream.update :flashes %>
diff --git a/app/views/measurements/_form_frame.html.erb b/app/views/measurements/_form_frame.html.erb
index f95f230..59dede4 100644
--- a/app/views/measurements/_form_frame.html.erb
+++ b/app/views/measurements/_form_frame.html.erb
@@ -1,7 +1,7 @@
 <%= tabular_form_with url: new_measurement_path, html: {id: :new_readouts_form} do %>
   <% if @readouts&.present? %>
     <fieldset>
-      <%= tag.legend @closest_ancestor.pathname if @closest_ancestor&.pathname %>
+      <%= tag.legend id: :new_readouts_form_legend %>
       <table class="items centered">
         <tbody id="readouts">
           <tr id="new_readouts_actions">
diff --git a/app/views/measurements/_form_repath.html.erb b/app/views/measurements/_form_repath.html.erb
new file mode 100644
index 0000000..3edfd12
--- /dev/null
+++ b/app/views/measurements/_form_repath.html.erb
@@ -0,0 +1,7 @@
+<%= turbo_stream.update(:new_readouts_form_legend) { @common_ancestor&.pathname } %>
+
+<% @prev_quantities.each do |pq| %>
+  <%= turbo_stream.update dom_id(pq, nil, :pathname) do %>
+    <%= pq.relative_pathname(@common_ancestor) %>
+  <% end %>
+<% end %>
diff --git a/app/views/measurements/discard.turbo_stream.erb b/app/views/measurements/discard.turbo_stream.erb
new file mode 100644
index 0000000..192a732
--- /dev/null
+++ b/app/views/measurements/discard.turbo_stream.erb
@@ -0,0 +1,2 @@
+<%= turbo_stream.remove dom_id(@quantity, :new, :readout) %>
+<%= render partial: 'form_repath' %>
diff --git a/app/views/measurements/index.html.erb b/app/views/measurements/index.html.erb
index 25d2013..86c5c4f 100644
--- a/app/views/measurements/index.html.erb
+++ b/app/views/measurements/index.html.erb
@@ -6,15 +6,14 @@
       <%= select_tag :id, options_from_collection_for_select(
         @quantities, :id, ->(q){ sanitize('&emsp;' * q.depth + q.name) }
       ), form: :new_readouts_form %>
-      <% common_options = {form: :new_readouts_form, formaction: new_measurement_path,
-                           formmethod: :get, formnovalidate: true,
-                           data: {turbo_stream: true}} %>
-      <%= image_button_tag t('.new_quantity'), 'plus-outline', name: :scope,
-        **common_options -%>
-      <%= image_button_tag t('.new_children'), 'plus-multiple-outline', name: :scope,
-        value: :children, **common_options -%>
-      <%= image_button_tag t('.new_subtree'), 'plus-multiple-outline', name: :scope,
-        value: :subtree, **common_options -%>
+      <% common_options = {form: :new_readouts_form, formmethod: :get,
+                           formnovalidate: true, data: {turbo_stream: true}} %>
+      <%= image_button_tag t('.new_quantity'), 'plus-outline',
+        formaction: new_measurement_path, **common_options -%>
+      <%= image_button_tag t('.new_children'), 'plus-multiple-outline',
+        formaction: new_measurement_path(:children), **common_options -%>
+      <%= image_button_tag t('.new_subtree'), 'plus-multiple-outline',
+        formaction: new_measurement_path(:subtree), **common_options -%>
     </div>
   <% end %>
 </div>
diff --git a/app/views/measurements/new.turbo_stream.erb b/app/views/measurements/new.turbo_stream.erb
index a70123e..74871be 100644
--- a/app/views/measurements/new.turbo_stream.erb
+++ b/app/views/measurements/new.turbo_stream.erb
@@ -2,6 +2,8 @@
   <%= render partial: 'form_frame' %>
 <% end if @prev_quantities.empty? %>
 
+<%= render partial: 'form_repath' %>
+
 <%= turbo_stream.before :new_readouts_actions do %>
   <%= render partial: 'form' %>
 <% end %>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index bee1caa..91d310f 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -65,9 +65,9 @@ en:
   measurements:
     navigation: Measurements
     index:
-      new_quantity: Add selected
-      new_children: Add children
-      new_subtree: Add subtree
+      new_quantity: Selected
+      new_children: Children
+      new_subtree: Subtree
   quantities:
     navigation: Quantities
     no_items: There are no configured quantities. You can Add some or Import from defaults.
diff --git a/config/routes.rb b/config/routes.rb
index 7d97b26..b40d356 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,5 +1,9 @@
 Rails.application.routes.draw do
-  resources :measurements
+  resources :measurements, path_names: {new: '/new(/:scope)'},
+    constraints: {scope: /children|subtree/}, defaults: {scope: nil} do
+
+    get 'discard/:id', on: :new, action: :discard, as: :discard
+  end
 
   resources :quantities, except: [:show], path_names: {new: '(/:id)/new'} do
     member { post :reparent }