v-selection

For manual selection You also need to set "single" or "multiple" selection to grid and manual selection to true for this to be useful For more how to work with selection go to here: selection functions

<v-grid-col>
  <v-header-template>
    <input v-selection="header" type="checkbox">
  </v-header-template>
  <v-row-template>
    <input v-selection="row" type="checkbox"
  </v-row-template>
</v-grid-col>

seelction column

if you dont make a selection column you highlight with the help of shift and control buttons

normal selection